This question bank covers all possible topics and question types that may appear in the exam
Q1.1 What is light?
A) A solid substance
B) A form of energy
C) A type of gas
D) A liquid material
Q1.2 Which of the following is a natural source of light?
A) Torch
B) Candle
C) Sun
D) Light bulb
Q1.3 Light travels in:
A) Curved lines
B) Circular paths
C) Straight lines
D) Zigzag patterns
Q1.4 Which statement about light is TRUE?
A) Light can travel through all materials
B) Light cannot be blocked
C) Light travels very slowly
D) Light can be reflected and refracted
Q1.5 What happens when light hits an opaque object?
A) It passes straight through
B) It is completely blocked
C) It changes color
D) It becomes brighter
Q1.6 Light is a form of _____________ that allows us to see objects.
Q1.7 Objects that produce their own light are called _____________ sources.
Q1.8 The Sun, stars, and fireflies are examples of _____________ light sources.
Q1.9 Bulbs, candles, and torches are examples of _____________ light sources.
Q1.10 Light always travels in _____________ lines unless it is reflected or refracted.
Q1.11 Name three natural sources of light.
Q1.12 Name three artificial sources of light.
Q1.13 Explain why we can see objects that do not produce their own light.
Q1.14 What is the speed of light approximately? (Simple answer: very fast/fastest thing)
Q1.15 Can light travel through a vacuum? Explain.
Q2.1 What is reflection?
A) Light passing through an object
B) Light bouncing off a surface
C) Light bending when entering water
D) Light being absorbed
Q2.2 When light reflects off a mirror, what happens to it?
A) It is absorbed
B) It passes through
C) It bounces back
D) It disappears
Q2.3 Which surface reflects light best?
A) Rough paper
B) Cloth
C) Smooth mirror
D) Wood
Q2.4 The ray of light that strikes a surface is called:
A) Reflected ray
B) Incident ray
C) Refracted ray
D) Normal ray
Q2.5 The ray of light that bounces off a surface is called:
A) Incident ray
B) Normal line
C) Reflected ray
D) Refracted ray
Q2.6 What is the normal line in reflection?
A) A line parallel to the mirror
B) A line perpendicular to the reflecting surface
C) The path of incident light
D) The reflected ray
Q2.7 Which of these materials will NOT reflect light well?
A) Polished steel
B) Still water
C) Rough sandpaper
D) Clean mirror
Q2.8 What type of image is formed by a plane mirror?
A) Real image
B) Virtual image
C) Inverted image
D) Magnified image
Q2.9 In a plane mirror, the image appears to be:
A) In front of the mirror
B) Behind the mirror
C) On the mirror surface
D) Above the mirror
Q2.10 The image formed in a plane mirror is:
A) Larger than the object
B) Smaller than the object
C) The same size as the object
D) Upside down
Q2.11 The bouncing of light from a surface is called _____________.
Q2.12 The ray that falls on a reflecting surface is called the _____________ ray.
Q2.13 The ray that bounces back from a reflecting surface is called the _____________ ray.
Q2.14 The imaginary line perpendicular to a reflecting surface is called the _____________.
Q2.15 Smooth, shiny surfaces produce the best _____________.
Q2.16 A plane mirror forms a _____________ image that appears behind the mirror.
Q2.17 The image in a plane mirror is _____________ inverted (left becomes right).
Q2.18 The distance of the object from the mirror equals the distance of the _____________ from the mirror.
Q2.19 Materials that reflect light well are called _____________ materials.
Q2.20 Most mirrors are made by coating glass with a thin layer of _____________ or aluminum.
Q2.21 All surfaces reflect some amount of light. (True/False)
Q2.22 Only mirrors can reflect light. (True/False)
Q2.23 A rough surface reflects light better than a smooth surface. (True/False)
Q2.24 The image in a plane mirror is the same distance behind the mirror as the object is in front. (True/False)
Q2.25 You can touch the image formed by a plane mirror. (True/False)
Q2.26 Define reflection of light.
Q2.27 What is the difference between an incident ray and a reflected ray?
Q2.28 Why do we see our reflection in a mirror but not in a wall?
Q2.29 Explain what a virtual image is.
Q2.30 List three properties of the image formed by a plane mirror.
Q2.31 Why does your image in a mirror appear to wave with its right hand when you wave with your left hand?
Q2.32 Name three objects in your home that act as mirrors.
Q2.33 What is the purpose of the normal line in studying reflection?
Q2.34 Can you see yourself in still water? Explain why.
Q2.35 Why are ambulances written in a special way (reversed letters)?
Q3.1 According to the Law of Reflection, the angle of incidence is:
A) Greater than the angle of reflection
B) Less than the angle of reflection
C) Equal to the angle of reflection
D) Double the angle of reflection
Q3.2 If a light ray hits a mirror at 30° to the normal, at what angle will it reflect?
A) 15°
B) 30°
C) 60°
D) 90°
Q3.3 If the angle of incidence is 0° (ray along the normal), the angle of reflection is:
A) 0°
B) 45°
C) 90°
D) 180°
Q3.4 Where do the incident ray, reflected ray, and normal lie?
A) In different planes
B) In the same plane
C) In parallel planes
D) In perpendicular planes
Q3.5 If the angle of reflection is 50°, what is the angle of incidence?
A) 25°
B) 40°
C) 50°
D) 100°
Q3.6 What is the angle between the incident ray and the reflected ray if the angle of incidence is 40°?
A) 40°
B) 80°
C) 100°
D) 140°
Q3.7 The Law of Reflection states that the angle of _____________ equals the angle of _____________.
Q3.8 The angle of incidence is measured between the incident ray and the _____________.
Q3.9 The angle of reflection is measured between the _____________ ray and the normal.
Q3.10 If light hits a mirror at 25° to the normal, it will reflect at _____________ degrees.
Q3.11 When a ray of light is perpendicular to a mirror (angle of incidence = 0°), the ray is reflected _____________ along the same path.
Q3.12 Both angles in reflection are always measured from the _____________, not from the mirror surface.
Q3.13 A ray of light strikes a plane mirror at an angle of 35° to the normal. Calculate:
a) The angle of reflection
b) The angle between the incident ray and reflected ray
Q3.14 If the angle between the incident ray and the reflected ray is 120°, what is the angle of incidence?
Q3.15 A light ray makes an angle of 70° with the surface of a mirror. What is the angle of incidence?
Q3.16 If the angle of incidence is 48°, what is:
a) The angle of reflection?
b) The angle between the reflected ray and the mirror surface?
Q3.17 A ray is reflected from a mirror such that the angle between the incident and reflected rays is 90°. Find the angle of incidence.
Q3.18 State the Law of Reflection.
Q3.19 Why are angles in reflection measured from the normal and not from the mirror surface?
Q3.20 Explain with a diagram how the Law of Reflection applies when light hits a plane mirror.
Q3.21 Does the Law of Reflection depend on the color of light? Explain.
Q3.22 If you increase the angle of incidence, what happens to the angle of reflection?
Q4.1 Which type of reflection produces a clear image?
A) Diffuse reflection
B) Specular reflection
C) Scattered reflection
D) Random reflection
Q4.2 Reflection from a rough surface is called:
A) Regular reflection
B) Specular reflection
C) Diffuse reflection
D) Clear reflection
Q4.3 Why can’t you see your clear reflection in a wall?
A) Because of specular reflection
B) Because of diffuse reflection
C) Because walls don’t reflect light
D) Because walls absorb all light
Q4.4 Which surface produces specular reflection?
A) Rough paper
B) Brick wall
C) Smooth mirror
D) Tree bark
Q4.5 Diffuse reflection occurs when light:
A) Bounces off in different directions
B) Bounces off in the same direction
C) Passes through the object
D) Is completely absorbed
Q4.6 Which type of reflection allows us to see the texture and details of objects?
A) Specular reflection
B) Diffuse reflection
C) Total reflection
D) Partial reflection
Q4.7 A calm lake produces which type of reflection?
A) Diffuse reflection
B) Scattered reflection
C) Specular reflection
D) No reflection
Q4.8 What happens to light during diffuse reflection?
A) All rays reflect in the same direction
B) Rays reflect in different directions
C) Light is absorbed completely
D) Light passes through the surface
Q4.9 _____________ reflection occurs on smooth, polished surfaces and produces clear images.
Q4.10 _____________ reflection occurs on rough surfaces and scatters light in many directions.
Q4.11 We can see our reflection in a mirror because of _____________ reflection.
Q4.12 We can see most everyday objects because of _____________ reflection.
Q4.13 The Moon appears bright because of _____________ reflection of sunlight.
Q4.14 A polished metal spoon produces _____________ reflection.
Q4.15 A sheet of white paper produces _____________ reflection.
Q4.16 Match the surface with the type of reflection:
| Surface | Type of Reflection |
|---|---|
| A. Smooth mirror | 1. Diffuse reflection |
| B. Rough wall | 2. Specular reflection |
| C. Still water | 3. Both types |
| D. Polished car surface | |
| E. Tree bark |
Q4.17 What is the difference between specular and diffuse reflection?
Q4.18 Why can you see your reflection in a mirror but not in a piece of paper?
Q4.19 Draw and label diagrams showing specular and diffuse reflection.
Q4.20 Explain why we can see objects that do not emit light.
Q4.21 Why does a calm lake produce a better reflection than a rippling lake?
Q4.22 Give three examples of surfaces that produce specular reflection.
Q4.23 Give three examples of surfaces that produce diffuse reflection.
Q4.24 Is the Law of Reflection obeyed in diffuse reflection? Explain.
Q4.25 Why is diffuse reflection important in our daily life?
Q5.1 What type of mirror has a flat reflecting surface?
A) Concave mirror
B) Convex mirror
C) Plane mirror
D) Curved mirror
Q5.2 The image formed by a plane mirror is:
A) Real and inverted
B) Virtual and upright
C) Real and upright
D) Virtual and inverted
Q5.3 If you stand 2 meters in front of a plane mirror, how far behind the mirror does your image appear?
A) 1 meter
B) 2 meters
C) 4 meters
D) 0 meters
Q5.4 What is lateral inversion?
A) The image being upside down
B) The image being the same size
C) Left and right being swapped
D) The image being virtual
Q5.5 Which characteristic is NOT true for a plane mirror image?
A) Same size as object
B) Virtual image
C) Laterally inverted
D) Upside down
Q5.6 If you hold a book with “SCIENCE” written on it in front of a mirror, what will you see?
A) SCIENCE
B) ECNEICS
C) ƎƆИƎIƆƧ (reversed)
D) The text upside down
Q5.7 A periscope uses:
A) One plane mirror
B) Two plane mirrors
C) Three plane mirrors
D) No mirrors
Q5.8 In a plane mirror, if the object is 5 cm tall, the image will be:
A) 2.5 cm tall
B) 5 cm tall
C) 10 cm tall
D) 15 cm tall
Q5.9 A plane mirror has a _____________ reflecting surface.
Q5.10 The image in a plane mirror is _____________ (can/cannot) be projected on a screen.
Q5.11 If an object is placed 30 cm from a plane mirror, the image will be _____________ cm from the mirror.
Q5.12 The phenomenon where left appears as right in a mirror is called _____________ inversion.
Q5.13 A real image _____________ (can/cannot) be caught on a screen, while a virtual image _____________.
Q5.14 The total distance between an object and its image in a plane mirror is _____________ the distance of the object from the mirror.
Q5.15 Plane mirrors are used in _____________ to see objects at different heights.
Q5.16 A plane mirror can form a magnified image. (True/False)
Q5.17 The image distance equals the object distance in a plane mirror. (True/False)
Q5.18 You can touch the image formed in a plane mirror. (True/False)
Q5.19 Plane mirrors always form upright images. (True/False)
Q5.20 The size of the image changes as you move closer to a plane mirror. (True/False)
Q5.21 Draw a labeled diagram showing how a plane mirror forms an image of an object. Include:
Q5.22 Draw a diagram showing the path of light in a simple periscope using two plane mirrors.
Q5.23 Illustrate lateral inversion with a diagram showing the word “HELLO” and its mirror image.
Q5.24 List five characteristics of an image formed by a plane mirror.
Q5.25 Explain why you cannot catch the image from a mirror on a paper.
Q5.26 How does a periscope work? Explain with a diagram.
Q5.27 What is the difference between a real image and a virtual image?
Q5.28 Why are plane mirrors used in dressing rooms?
Q5.29 Explain the term “lateral inversion” with an example.
Q5.30 If you move towards a plane mirror at 2 m/s, at what speed does your image move towards you?
Q5.31 Why do dentists use small mirrors?
Q5.32 How would you use two plane mirrors to see the back of your head?
Q6.1 What is refraction?
A) The bouncing of light from a surface
B) The bending of light when it passes from one medium to another
C) The absorption of light
D) Light traveling in straight lines
Q6.2 Refraction occurs when light:
A) Reflects from a mirror
B) Passes through the same medium
C) Changes medium (e.g., air to water)
D) Is blocked by an object
Q6.3 When light travels from air into water, it:
A) Speeds up and bends away from normal
B) Slows down and bends toward normal
C) Continues in a straight line
D) Stops at the boundary
Q6.4 When light travels from water into air, it:
A) Slows down and bends toward normal
B) Speeds up and bends away from normal
C) Does not change direction
D) Is completely absorbed
Q6.5 Why does a pencil appear bent when placed in water?
A) Because of reflection
B) Because of refraction
C) Because water magnifies objects
D) Because of absorption
Q6.6 The bending of light as it passes from one medium to another is called:
A) Reflection
B) Diffusion
C) Refraction
D) Absorption
Q6.7 Light travels fastest in:
A) Water
B) Glass
C) Air/vacuum
D) Diamond
Q6.8 When light enters a denser medium (like glass from air), it:
A) Bends away from the normal
B) Bends toward the normal
C) Does not bend
D) Reflects completely
Q6.9 A swimming pool appears shallower than it actually is because of:
A) Reflection
B) Refraction
C) Diffraction
D) Absorption
Q6.10 Which of these is NOT an example of refraction?
A) A straw appearing bent in water
B) A mirage on a hot road
C) Seeing your face in a mirror
D) A coin appearing at a different position in water
Q6.11 The speed of light is maximum in:
A) Glass
B) Water
C) Vacuum
D) Diamond
Q6.12 When light ray enters perpendicular to the surface (along the normal), it:
A) Bends toward normal
B) Bends away from normal
C) Goes straight without bending
D) Reflects back
Q6.13 The bending of light when it passes from one transparent medium to another is called _____________.
Q6.14 Light _____________ (speeds up/slows down) when it enters a denser medium like water from air.
Q6.15 When light slows down entering a medium, it bends _____________ the normal.
Q6.16 When light speeds up leaving a medium, it bends _____________ from the normal.
Q6.17 A ray that has been refracted is called a _____________ ray.
Q6.18 The angle between the refracted ray and the normal is called the angle of _____________.
Q6.19 Light travels at approximately _____________ km/s in a vacuum.
Q6.20 In denser media, light travels _____________ than in less dense media.
Q6.21 Refraction is responsible for the formation of _____________ by water droplets.
Q6.22 A _____________ is formed when light refracts through a glass prism, splitting white light into colors.
Q6.23 Refraction occurs only when light changes medium. (True/False)
Q6.24 Light always bends toward the normal when entering any new medium. (True/False)
Q6.25 A coin at the bottom of a glass of water appears closer to the surface due to refraction. (True/False)
Q6.26 Refraction explains why stars twinkle. (True/False)
Q6.27 Light does not refract when it enters perpendicular to the surface. (True/False)
Q6.28 The speed of light is the same in all materials. (True/False)
Q6.29 Define refraction of light.
Q6.30 Explain why refraction occurs when light changes medium.
Q6.31 What is the difference between reflection and refraction?
Q6.32 Why does light bend when it enters water from air?
Q6.33 Describe what happens to the speed and direction of light when it moves from air to glass.
Q6.34 Why does a swimming pool appear shallower than its actual depth?
Q6.35 Explain why a straw in a glass of water appears bent or broken.
Q6.36 What happens to the direction of light when it passes along the normal (perpendicular)?
Q6.37 List three everyday examples of refraction.
Q6.38 Why does a thick glass slab not displace an object’s position much, even though refraction occurs twice?
Q7.1 Which device uses reflection to see objects above eye level?
A) Microscope
B) Telescope
C) Periscope
D) Magnifying glass
Q7.2 Why are mirrors used in solar cookers?
A) To reflect and concentrate sunlight
B) To refract sunlight
C) To absorb heat
D) To scatter light
Q7.3 Which optical phenomenon allows lenses in eyeglasses to correct vision?
A) Reflection
B) Refraction
C) Absorption
D) Diffusion
Q7.4 A rainbow is formed due to:
A) Reflection only
B) Refraction only
C) Both reflection and refraction
D) Absorption
Q7.5 Fiber optic cables used in telecommunications work based on:
A) Reflection of light
B) Refraction of light
C) Total internal reflection
D) Diffuse reflection
Q7.6 Car rear-view mirrors use which principle?
A) Refraction
B) Reflection
C) Absorption
D) Dispersion
Q7.7 A magnifying glass works by:
A) Reflecting light
B) Refracting light
C) Absorbing light
D) Scattering light
Q7.8 Why do stars appear to twinkle?
A) They emit pulsing light
B) Refraction in Earth’s atmosphere
C) Reflection from clouds
D) They are very small
Q7.9 Mirages seen on hot roads are due to:
A) Reflection from the road
B) Refraction in air layers of different temperatures
C) Our imagination
D) Water on the road
Q7.10 Which instrument uses both reflection and refraction?
A) Simple mirror
B) Glass slab
C) Camera
D) Plane surface
Q7.11 A _____________ uses two plane mirrors to see over obstacles.
Q7.12 _____________ are used by dentists to see inside the mouth clearly.
Q7.13 _____________ in cars allow drivers to see behind them using reflection.
Q7.14 A _____________ splits white light into seven colors using refraction.
Q7.15 _____________ use curved mirrors to focus light and produce heat.
Q7.16 Underwater objects appear closer than they are because of _____________.
Q7.17 _____________ use lenses (refraction) to help people see clearly.
Q7.18 The _____________ of a diamond makes it sparkle due to total internal reflection.
Q7.19 How does a periscope help us see objects that are not in our direct line of sight?
Q7.20 Explain why ambulances have the word “AMBULANCE” written in reverse on the front.
Q7.21 How do eyeglasses help people with poor vision?
Q7.22 Why does a spoon partially dipped in water appear bent at the water surface?
Q7.23 Explain how a rainbow is formed.
Q7.24 Why do stars twinkle but planets do not (or twinkle less)?
Q7.25 What causes a mirage on a hot road?
Q7.26 How does a kaleidoscope create beautiful patterns?
Q7.27 Why is it difficult to spear a fish in water if you aim directly at where you see it?
Q7.28 How do solar panels use mirrors?
Q7.29 Explain how a camera uses lenses to capture images.
Q7.30 Why does a coin placed at the bottom of a bucket become visible when water is poured in?
Q8.1 Draw a ray diagram showing reflection from a plane mirror. Label:
Q8.2 Draw a ray diagram showing light refracting as it enters a glass block from air. Label:
Q8.3 Draw a ray diagram showing light refracting as it exits a glass block into air. Label all parts.
Q8.4 Draw the complete path of a light ray passing through a rectangular glass block (entering and exiting). Show:
Q8.5 Draw a ray diagram showing how a periscope works using two plane mirrors.
Q8.6 Draw a diagram showing diffuse reflection from a rough surface with multiple incident rays.
Q8.7 Draw a diagram showing specular reflection from a smooth mirror with multiple incident rays.
Q8.8 Complete the following ray diagrams:
a) An incident ray is given hitting a mirror at 40° - draw the reflected ray
b) A ray entering water from air - show the refracted path
c) A ray exiting water to air - show the refracted path
Q8.9 Look at this ray diagram [diagram showing reflection]. Identify and label:
Q8.10 In the given diagram showing refraction, explain why the ray bends toward the normal.
Q8.11 Study the ray diagram of light passing through a glass slab. Explain why the emergent ray is parallel to the incident ray.
Q8.12 Observe the given diagram showing two mirrors at 90° to each other. Complete the path of light as it reflects from both mirrors.
Q8.13 Draw a ray diagram to show how your image is formed when you stand in front of a plane mirror.
Q8.14 Using ray diagrams, explain why a pencil appears bent in water.
Q8.15 Draw the path of light through a periscope and explain how it allows you to see over a wall.
Q9.1 Materials that allow light to pass through them completely are called:
A) Opaque
B) Transparent
C) Translucent
D) Reflective
Q9.2 Materials that do not allow any light to pass through are called:
A) Transparent
B) Translucent
C) Opaque
D) Clear
Q9.3 Materials that allow some light to pass through but you cannot see clearly through them are:
A) Transparent
B) Opaque
C) Translucent
D) Reflective
Q9.4 Which of these is transparent?
A) Wood
B) Clear glass
C) Frosted glass
D) Metal
Q9.5 Which of these is opaque?
A) Water
B) Clear plastic
C) Brick
D) Window glass
Q9.6 Which of these is translucent?
A) Window glass
B) Mirror
C) Frosted glass
D) Metal sheet
Q9.7 Shadows are formed when light is blocked by:
A) Transparent materials
B) Opaque materials
C) Translucent materials
D) All materials
Q9.8 Which material would form the darkest shadow?
A) Clear glass
B) Tracing paper
C) Wooden board
D) Thin cloth
Q9.9 _____________ materials allow all light to pass through clearly.
Q9.10 _____________ materials block all light and form shadows.
Q9.11 _____________ materials allow some light to pass but scatter it.
Q9.12 Clear window glass is an example of a _____________ material.
Q9.13 Wood and metal are examples of _____________ materials.
Q9.14 Frosted glass and butter paper are examples of _____________ materials.
Q9.15 Only _____________ objects can form clear, dark shadows.
Q9.16 Classify the following materials as Transparent (T), Translucent (TL), or Opaque (O):
a) Clear water glass
b) Wooden door
c) Wax paper
d) Air
e) Aluminum foil
f) Thin fabric
g) Diamond
h) Book
i) Cellophane paper
j) Stone
Q9.17 Which of these materials would allow you to see through clearly?
(List all that apply): Glass, Wood, Water, Metal, Air, Plastic bottle, Wall, Clear ice
Q9.18 Which materials would cast a complete shadow?
(List all that apply): Mirror, Cardboard, Tracing paper, Clear plastic, Brick, Frosted glass
Q9.19 Explain the difference between transparent, translucent, and opaque materials.
Q9.20 Why can you see through a window but not through a wall?
Q9.21 Give three examples each of transparent, translucent, and opaque materials.
Q9.22 Why does frosted glass allow light through but you cannot see clearly through it?
Q9.23 Can transparent materials form shadows? Explain.
Q9.24 Why are some materials opaque while others are transparent?
Q9.25 How would you test whether a material is transparent, translucent, or opaque?
Q10.1 A ray of light strikes a plane mirror at an angle of 25° to the normal. Calculate:
a) The angle of reflection
b) The angle between the incident and reflected rays
Q10.2 The angle between an incident ray and a reflected ray is 110°. What is the angle of incidence?
Q10.3 A light ray strikes a mirror at 42° to the normal. What angle does the reflected ray make with the mirror surface?
Q10.4 If a ray of light makes an angle of 60° with the mirror surface, what is the angle of incidence?
Q10.5 Two plane mirrors are placed at 60° to each other. A ray strikes the first mirror at 30° to its normal. Calculate the angle at which it hits the second mirror.
Q10.6 An object is placed 15 cm in front of a plane mirror. How far behind the mirror will the image appear?
Q10.7 You stand 3 m from a mirror. What is the distance between you and your image?
Q10.8 If the image of an object appears 40 cm behind a mirror, how far is the object from the mirror?
Q10.9 A girl walks toward a mirror at 0.5 m/s. At what speed does her image approach her?
Q10.10 A candle is 20 cm from a mirror. If you look at the image, how far does the light travel from the candle to your eye via the mirror, if you are 30 cm from the mirror?
Q10.11 You want to see objects that are over a 2-meter wall. Explain how you would design a simple periscope. Include a diagram.
Q10.12 A coin is placed in a container. You move back until the coin is just out of sight. When water is poured in, you can see the coin again. Explain why using a diagram.
Q10.13 Design an investigation to prove that the angle of incidence equals the angle of reflection. List:
a) Materials needed
b) Method
c) What you would measure
d) Expected results
Q10.14 You want to investigate how the size of a shadow changes. Design an experiment including:
a) Hypothesis
b) Variables (independent, dependent, controlled)
c) Method
d) How you would record results
Q10.15 A student claims that a thick glass slab makes objects appear at a different position. Design an experiment to test this claim.
Q10.16 A pencil in water appears bent. Draw a ray diagram and explain the path of light from the submerged part of the pencil to your eye.
Q10.17 Explain why fishermen need to aim below where they see a fish to spear it successfully.
Q10.18 Two students disagree: One says “Light always travels in straight lines” and the other says “Light bends in water.” Who is correct? Explain.
Q10.19 Why does a thick glass block not significantly change the apparent position of an object viewed through it, even though light bends twice?
Q10.20 A driver looks in the rear-view mirror and sees a car behind. Draw a ray diagram showing how light travels from the car to the driver’s eye.
Q10.21 Compare and contrast reflection and refraction. Create a table with at least 5 differences.
Q10.22 Compare specular and diffuse reflection. Include:
a) Definition
b) Type of surface
c) Behavior of reflected rays
d) Examples
e) Uses
Q10.23 Compare the image formed by a plane mirror with the actual object. Use a table with characteristics: size, orientation, position, nature (real/virtual).
Q10.24 Explain why you can see a clear image in a mirror but not in a white wall, even though both reflect light.
Q10.25 Describe how light behaves when it interacts with different materials. Include discussion of reflection, refraction, absorption, and transmission.
Q10.26 Explain the formation of a rainbow, discussing both reflection and refraction.
Q10.27 Write a detailed explanation of how a periscope works, including the role of plane mirrors and the Law of Reflection.
Q10.28 Discuss at least five applications of reflection and refraction in everyday life and technology.
Q10.29 A student observes that:
Q10.30 Design a poster explaining the difference between reflection and refraction to younger students. List what you would include.
Q11.1 Design an experiment to show that light travels in straight lines. Include:
Q11.2 Plan an investigation to verify the Law of Reflection. Include:
Q11.3 Design an activity to demonstrate refraction using everyday materials.
Q11.4 How would you investigate which type of surface reflects light best?
Q11.5 Plan an experiment to show that shadows change size depending on the distance of the object from the light source.
Q11.6 In an experiment, a ray box is used to shine light on a mirror. The angle of incidence is measured as 35°. What would you expect the angle of reflection to be? Explain.
Q11.7 A student places a ruler in a beaker of water and observes it from the side. What will the student see? Explain.
Q11.8 During an investigation, light is shone through different materials: clear glass, frosted glass, and wood. Describe what would be observed for each.
Q11.9 In a shadow investigation, an object is moved closer to a light source. What happens to the shadow? Why?
Q11.10 A student uses a laser pointer to trace the path of light through a glass block. Why is it important to mark the incident and emergent rays?
Q11.11 What safety precautions should be taken when using mirrors and lasers in light experiments?
Q11.12 Why is it important to use a ruler when drawing ray diagrams?
Q11.13 How can you ensure accuracy when measuring angles in reflection experiments?
Q11.14 Why should experiments be repeated multiple times?
Q11.15 What factors might cause errors in a refraction experiment?
Q12.1 A student says, “I can see the Moon because it produces its own light.” Is this correct? Explain.
Q12.2 Someone claims that virtual images don’t exist because you can’t touch them. Evaluate this statement.
Q12.3 Why can you see underwater objects from above water, but someone underwater cannot easily see you above water?
Q12.4 Two students are investigating reflection. One says angles should be measured from the mirror surface, the other says from the normal. Who is correct and why?
Q12.5 Analyze why a swimming pool has warning signs about depth, mentioning that it appears shallower than it is.
Q12.6 How would reflection and refraction be different on the Moon where there is no atmosphere?
Q12.7 Explain how you could use mirrors to read a book while lying flat on your back.
Q12.8 If you were designing a solar cooker, how would you use reflection to make it more efficient?
Q12.9 How might understanding refraction help someone design better underwater cameras?
Q12.10 Why do some animals have reflective eyes that “glow” in the dark when light shines on them?
Q12.11 Predict what would happen to your reflection if you used a curved mirror instead of a plane mirror.
Q12.12 What do you think would happen to the angle of refraction if light entered a material that is even denser than glass?
Q12.13 If two parallel mirrors face each other with an object between them, predict what you would see. Explain.
Q12.14 Predict and explain what happens to a light ray that enters a triangular glass prism.
Q12.15 What would happen if you tried to use a mirror underwater? Would it still work? Explain.
Q12.16 Design a device using mirrors that would allow you to see around a corner. Draw and explain.
Q12.17 Create a concept map connecting all the key ideas about reflection and refraction.
Q12.18 Develop a mnemonic or memory aid to help remember the differences between transparent, translucent, and opaque.
Q12.19 Write a short story that includes at least five examples of reflection or refraction from real life.
Q12.20 Create a quiz with 10 questions that would help someone else learn about light, reflection, and refraction.
Q13.1 True or False: “Light only reflects from mirrors.”
Explain why this is a misconception.
Q13.2 A student says, “When I look in a mirror, I can touch my image.” Correct this misconception.
Q13.3 “Refraction only happens in water.” Explain why this is incorrect.
Q13.4 “Light travels at the same speed everywhere.” Correct this statement.
Q13.5 “Transparent materials don’t affect light at all.” Explain what’s wrong with this thinking.
Q13.6 If you stand in front of a mirror and raise your right hand, which hand does your image appear to raise?
Q13.7 Can you see your image in a mirror if you are in complete darkness? Explain.
Q13.8 Two identical objects are placed at different distances from a plane mirror. Are their images the same size?
Q13.9 Will a light ray refract if it enters water exactly perpendicular to the surface? Explain.
Q13.10 Which appears to bend more when placed in water: a thick pencil or a thin pencil? Why?
Q13.11 Why can’t you photograph a virtual image?
Q13.12 Why does the size of your image in a plane mirror not change as you walk away from it?
Q13.13 Why does light slow down in denser media?
Q13.14 Why do we need the concept of “normal” in studying reflection and refraction?
Q13.15 Why does white light split into colors when passing through a prism?
Q14.1 Define the following terms:
a) Reflection
b) Refraction
c) Incident ray
d) Reflected ray
e) Refracted ray
f) Normal
g) Angle of incidence
h) Angle of reflection
i) Angle of refraction
j) Transparent
k) Translucent
l) Opaque
m) Specular reflection
n) Diffuse reflection
o) Virtual image
p) Real image
q) Lateral inversion
r) Plane mirror
s) Medium
t) Light ray
Q14.2 Match the term with its definition:
| Term | Definition |
|---|---|
| A. Incident ray | 1. Bouncing of light from a surface |
| B. Reflection | 2. Materials that don’t allow light through |
| C. Refraction | 3. Ray coming toward a surface |
| D. Normal | 4. Bending of light between media |
| E. Opaque | 5. Line perpendicular to surface |
| F. Virtual image | 6. Image that cannot be caught on screen |
| G. Lateral inversion | 7. Left-right reversal |
| H. Transparent | 8. Materials that allow light through clearly |
Q14.3 Complete these sentences with appropriate scientific terms:
a) The _____________ is an imaginary line perpendicular to the reflecting surface.
b) The _____________ is the angle between the incident ray and the normal.
c) A _____________ image appears to be behind the mirror but cannot be projected.
d) _____________ reflection occurs on rough surfaces.
e) The path taken by light is represented by a _____________.
f) The _____________ is the ray that bounces back from a surface.
g) Light travels fastest in a _____________.
h) The change in direction of light when entering a different medium is called _____________.
Q15.1 (Math Integration) If a mirror is 180 cm tall and you can see your full reflection in it, what is the minimum height of the mirror needed? (Assume you are 180 cm tall)
Q15.2 (Math Integration) A light ray reflects from three mirrors arranged in a triangle, each at 60° to the normal. Calculate the total angle through which the light has been turned.
Q15.3 (Technology) Research and explain how fiber optic cables use total internal reflection to transmit data.
Q15.4 (Art) Explain how artists use mirrors in kaleidoscopes to create symmetrical patterns.
Q15.5 (Biology) How do the eyes use refraction to focus light on the retina?
Q15.6 How do optometrists use their understanding of refraction to prescribe corrective lenses?
Q15.7 Why is understanding reflection important for photographers?
Q15.8 How do astronomers use reflection and refraction in telescopes?
Q15.9 Explain how architects might use mirrors in building design.
Q15.10 Why do submarine crews need to understand how periscopes work?
Q15.11 How does understanding light help in designing energy-efficient buildings with natural lighting?
Q15.12 Explain how solar panels use reflection to maximize energy collection.
Q15.13 Why is it important to understand refraction when designing aquariums?
Q15.14 How does refraction affect drivers on wet roads at night?
Q15.15 Explain how understanding reflection helps in road safety (reflective signs, clothing).
Q16.1 What is a lens?
A) A flat piece of glass
B) A curved transparent material that refracts light
C) A mirror that reflects light
D) An opaque material that blocks light
Q16.2 A convex lens is:
A) Thinner in the middle than at the edges
B) Thicker in the middle than at the edges
C) Flat on both sides
D) Curved inward on both sides
Q16.3 A concave lens is:
A) Thicker in the middle than at the edges
B) Thinner in the middle than at the edges
C) Flat on one side
D) The same as a plane mirror
Q16.4 A convex lens is also known as:
A) Diverging lens
B) Converging lens
C) Plane lens
D) Dispersing lens
Q16.5 A concave lens is also known as:
A) Converging lens
B) Focusing lens
C) Diverging lens
D) Magnifying lens
Q16.6 What happens to parallel rays of light passing through a convex lens?
A) They diverge (spread apart)
B) They converge (meet at a point)
C) They reflect back
D) They are absorbed
Q16.7 What happens to parallel rays of light passing through a concave lens?
A) They converge to a point
B) They reflect back
C) They diverge (spread apart)
D) They travel straight through
Q16.8 The focal point (principal focus) of a convex lens is:
A) The center of the lens
B) The point where parallel rays meet after passing through the lens
C) The edge of the lens
D) A point inside the lens material
Q16.9 The focal length of a lens is:
A) The thickness of the lens
B) The diameter of the lens
C) The distance from the center of the lens to its focal point
D) The distance between the two surfaces of the lens
Q16.10 Which lens can be used as a magnifying glass?
A) Concave lens
B) Plane mirror
C) Convex lens
D) Flat glass
Q16.11 A convex lens can form:
A) Only virtual images
B) Only real images
C) Both real and virtual images depending on object position
D) No images at all
Q16.12 A concave lens always forms:
A) Real and inverted images
B) Virtual, upright, and diminished images
C) Magnified real images
D) Images that can be caught on a screen
Q16.13 The principal axis of a lens is:
A) The edge of the lens
B) A line passing through the center of the lens perpendicular to its surfaces
C) The focal length
D) The surface of the lens
Q16.14 When an object is placed beyond 2F (twice the focal length) from a convex lens, the image formed is:
A) Virtual, upright, and magnified
B) Real, inverted, and diminished
C) Real, upright, and same size
D) Virtual, inverted, and diminished
Q16.15 When an object is placed between F and the optical center of a convex lens, the image is:
A) Real and inverted
B) Virtual, upright, and magnified
C) Real and diminished
D) Cannot be formed
Q16.16 What type of image is formed by a concave lens regardless of object position?
A) Real, inverted, magnified
B) Virtual, upright, diminished
C) Real, upright, magnified
D) It varies with position
Q16.17 Which of these devices uses a convex lens?
A) Periscope
B) Plane mirror
C) Camera
D) Flat window
Q16.18 A person with myopia (nearsightedness) needs:
A) A convex lens
B) A concave lens
C) A plane mirror
D) No correction
Q16.19 A person with hyperopia (farsightedness) needs:
A) A concave lens
B) A plane mirror
C) A convex lens
D) No correction
Q16.20 The power of a lens depends on:
A) Its color
B) Its curvature and focal length
C) Its size only
D) The material it’s made from only
Q16.21 A lens that is thicker at the center than at the edges is called a _____________ lens.
Q16.22 A lens that is thinner at the center than at the edges is called a _____________ lens.
Q16.23 A convex lens _____________ (converges/diverges) parallel rays of light.
Q16.24 A concave lens _____________ (converges/diverges) parallel rays of light.
Q16.25 The point where parallel rays of light meet after passing through a convex lens is called the _____________ or principal focus.
Q16.26 The distance from the center of a lens to its focal point is called the _____________.
Q16.27 Convex lenses can create _____________ images that can be projected on a screen.
Q16.28 Concave lenses always create _____________ images that cannot be projected on a screen.
Q16.29 A magnifying glass uses a _____________ lens to make objects appear larger.
Q16.30 The line passing through the center of a lens perpendicular to its surfaces is called the _____________ axis.
Q16.31 When light passes through a lens, it undergoes _____________ (reflection/refraction).
Q16.32 A convex lens is _____________ (thicker/thinner) in the middle compared to its edges.
Q16.33 Eyeglasses use _____________ to correct vision problems.
Q16.34 A _____________ lens can be used to start a fire by focusing sunlight.
Q16.35 The image formed by a concave lens is always _____________ (real/virtual) and _____________ (upright/inverted).
Q16.36 A convex lens can form both real and virtual images. (True/False)
Q16.37 A concave lens can form real images. (True/False)
Q16.38 The focal length of a convex lens is considered positive. (True/False)
Q16.39 The focal length of a concave lens is considered negative. (True/False)
Q16.40 Every lens has two focal points, one on each side. (True/False)
Q16.41 A magnifying glass uses a concave lens. (True/False)
Q16.42 Real images formed by convex lenses are always inverted. (True/False)
Q16.43 Virtual images formed by convex lenses are upright. (True/False)
Q16.44 A concave lens makes objects appear smaller. (True/False)
Q16.45 Lenses work by refracting light. (True/False)
Q16.46 The human eye contains a lens. (True/False)
Q16.47 A convex lens cannot produce an upright image. (True/False)
Q16.48 All lenses must be made of glass. (True/False)
Q16.49 A thicker convex lens has a shorter focal length than a thinner one. (True/False)
Q16.50 Concave lenses are used in cameras. (True/False)
Q16.51 What is the main difference between a convex lens and a concave lens?
Q16.52 Explain what happens to parallel rays of light when they pass through a convex lens.
Q16.53 Explain what happens to parallel rays of light when they pass through a concave lens.
Q16.54 Define the term “focal point” of a lens.
Q16.55 Define the term “focal length” of a lens.
Q16.56 What is the principal axis of a lens?
Q16.57 Why is a convex lens called a “converging lens”?
Q16.58 Why is a concave lens called a “diverging lens”?
Q16.59 List three uses of convex lenses in real life.
Q16.60 List three uses of concave lenses in real life.
Q16.61 How does a magnifying glass work?
Q16.62 Explain why a concave lens cannot be used to start a fire like a convex lens can.
Q16.63 What is the difference between a real image and a virtual image formed by a lens?
Q16.64 Describe the image formed when an object is placed very far from a convex lens.
Q16.65 Describe the image formed when an object is placed very close to a convex lens (between F and optical center).
Q16.66 Why do some people need to wear glasses?
Q16.67 How does a camera use lenses to capture images?
Q16.68 What type of lens is used in a simple microscope?
Q16.69 What happens to the focal length of a lens if its curvature increases?
Q16.70 Can you use a concave lens to magnify objects? Explain why or why not.
Q16.71 Draw a ray diagram showing parallel rays passing through a convex lens. Label:
Q16.72 Draw a ray diagram showing parallel rays passing through a concave lens. Label:
Q16.73 Draw a ray diagram for a convex lens with an object placed beyond 2F. Show:
Q16.74 Draw a ray diagram for a convex lens with an object placed between F and the optical center. Show:
Q16.75 Draw a ray diagram for a concave lens with any object position. Show:
Q16.76 Explain how to use ray diagrams to locate the image formed by a lens.
Q16.77 In a ray diagram for a convex lens, which ray always passes through the focal point after refraction?
Q16.78 Draw the symbol used to represent a convex lens in ray diagrams.
Q16.79 Draw the symbol used to represent a concave lens in ray diagrams.
Q16.80 Complete the ray diagram: An object is placed at 2F from a convex lens. Draw and label the image.
Q16.81 If a convex lens has a focal length of 10 cm, where would parallel rays of sunlight be focused?
Q16.82 An object is placed 30 cm from a convex lens with a focal length of 15 cm. Is the object beyond 2F, between F and 2F, or between F and the lens?
Q16.83 A magnifying glass has a focal length of 5 cm. How close should you hold an object to see an enlarged image?
Q16.84 Why does a convex lens sometimes form a real image and sometimes a virtual image?
Q16.85 Explain why a concave lens always forms a diminished image regardless of object position.
Q16.86 A student uses a convex lens to focus sunlight onto a piece of paper. The paper catches fire. Explain why this happens.
Q16.87 If you hold a convex lens close to this page, the words appear magnified. What type of image is this and where is the page positioned relative to the focal point?
Q16.88 A photographer wants to take a picture of a person standing far away. What type of lens should the camera use and what type of image will be formed?
Q16.89 Why can’t you project the image formed by a concave lens onto a screen?
Q16.90 Compare the images formed by convex and concave lenses when an object is placed at the same distance from each lens.
Q16.91 Compare convex and concave lenses. Create a table with:
Q16.92 Compare real and virtual images formed by lenses. Include:
Q16.93 Create a comparison table showing:
Q16.94 How is image formation by a lens different from image formation by a plane mirror?
Q16.95 Compare the focal point of a convex lens with that of a concave lens.
Q16.96 Explain how the human eye uses a lens to see objects.
Q16.97 How do reading glasses help people see small text clearly?
Q16.98 Why do car headlights use convex lenses or mirrors?
Q16.99 How does a telescope use lenses to see distant objects?
Q16.100 Explain how a projector uses a convex lens to display images on a screen.
Q16.101 Why are convex lenses used in cameras?
Q16.102 How does a compound microscope use multiple lenses to magnify objects?
Q16.103 What type of lens would you use to reduce the size of an image? Explain.
Q16.104 A person cannot see distant objects clearly but can see nearby objects well. What vision problem do they have and what type of lens do they need?
Q16.105 A person cannot see nearby objects clearly but can see distant objects well. What vision problem do they have and what type of lens do they need?
Q16.106 Explain why a lens with greater curvature has a shorter focal length.
Q16.107 What is the relationship between the focal length and the power of a lens?
Q16.108 If you immerse a convex lens in water, does its focal length change? Why?
Q16.109 Describe an experiment to find the focal length of a convex lens using sunlight.
Q16.110 Explain how a lens works using your knowledge of refraction.
Q16.111 Why are images formed by convex lenses sometimes real and sometimes virtual?
Q16.112 Design an experiment to demonstrate that a convex lens converges light rays.
Q16.113 How would you experimentally verify that a concave lens always forms a virtual image?
Q16.114 If you place two convex lenses in series (one after another), what happens to the light?
Q16.115 Explain why aberrations (distortions) can occur in images formed by lenses.
Q16.116 Write a detailed explanation of how a camera works, including the role of the convex lens, aperture, and image sensor/film.
Q16.117 Explain how glasses correct vision problems for people with myopia and hyperopia. Include diagrams.
Q16.118 Describe the complete path of light from an object through a convex lens to form a real image. Include a labeled ray diagram.
Q16.119 Discuss at least five practical applications of convex and concave lenses in everyday devices.
Q16.120 Compare and contrast how mirrors and lenses manipulate light. What are the similarities and differences?
Note: Complete detailed answers for all questions are available in the separate Answer Key document. Below is a summary of key concepts to check:
□ Can you state the Law of Reflection?
□ Can you draw and label a reflection ray diagram?
□ Can you draw and label a refraction ray diagram?
□ Do you know the 5 properties of a plane mirror image?
□ Can you explain why a pencil looks bent in water?
□ Do you know the difference between specular and diffuse reflection?
□ Can you calculate angles in reflection problems?
□ Can you classify materials as transparent, translucent, or opaque?
□ Do you understand how a periscope works?
□ Can you give 3 examples each of reflection and refraction in daily life?
□ Can you differentiate between convex and concave lenses?
□ Can you draw ray diagrams for both types of lenses?
□ Do you know what type of images each lens forms?
□ Can you explain how a magnifying glass works?
□ Do you understand how eyeglasses correct vision?
END OF QUESTION BANK
Total Questions: 500+
Coverage: Complete Unit 6 syllabus INCLUDING LENSES
Difficulty Range: Foundation to Advanced
Format: All exam question types included
NEW: 120 questions on Lenses (Section 16)
Good luck with your preparation, Trisha!