NCERT Class 7 Science MCQ | Chapter 11: Light: Shadows and Reflections
1. What is light?
(A) A form of energy that enables us to see objects
(B) A form of matter
(C) A type of sound
(D) A type of heat only
Answer: (A) A form of energy that enables us to see objects
2. Which of the following is a natural source of light?
(A) Sun
(B) Electric bulb
(C) Torch
(D) Candle
Answer: (A) Sun
3. Which of the following is an artificial source of light?
(A) Sun
(B) Stars
(C) Electric bulb
(D) Firefly
Answer: (C) Electric bulb
4. Which type of objects produce their own light?
(A) Luminous objects
(B) Transparent objects
(C) Opaque objects
(D) Translucent objects
Answer: (A) Luminous objects
5. Which of the following is a luminous object?
(A) Sun
(B) Book
(C) Moon
(D) Table
Answer: (A) Sun
6. Why can we see a non-luminous object?
(A) Light reflected from the object reaches our eyes
(B) The object produces its own light
(C) The object absorbs all light
(D) The object becomes luminous at night
Answer: (A) Light reflected from the object reaches our eyes
7. What is a shadow?
(A) A dark region formed when an opaque object blocks light
(B) A source of light
(C) A reflection of an object in a mirror
(D) A transparent region
Answer: (A) A dark region formed when an opaque object blocks light
8. Which type of object is most suitable for forming a clear shadow?
(A) Opaque object
(B) Transparent object
(C) Completely transparent glass
(D) Clear water
Answer: (A) Opaque object
9. Which of the following is an opaque object?
(A) Wooden book
(B) Clear glass
(C) Clean water
(D) Air
Answer: (A) Wooden book
10. Which of the following is a transparent material?
(A) Clear glass
(B) Wood
(C) Cardboard
(D) Metal sheet
Answer: (A) Clear glass
11. Which type of material allows some light to pass through it but does not allow clear images to be seen?
(A) Translucent
(B) Opaque
(C) Luminous
(D) Metallic
Answer: (A) Translucent
12. Which of the following is an example of a translucent material?
(A) Butter paper
(B) Wooden board
(C) Iron sheet
(D) Cardboard
Answer: (A) Butter paper
13. What three things are generally required to form a shadow?
(A) A source of light, an opaque object and a screen
(B) Only an opaque object
(C) Only a screen
(D) Only a source of light
Answer: (A) A source of light, an opaque object and a screen
14. What happens to the shadow when an opaque object is placed between a light source and a screen?
(A) A dark region appears on the screen
(B) The screen becomes luminous
(C) The object becomes transparent
(D) The light source disappears
Answer: (A) A dark region appears on the screen
15. What happens to the size of a shadow when an object is moved closer to a light source?
(A) The shadow generally becomes larger
(B) The shadow always disappears
(C) The shadow becomes smaller in every case
(D) The object becomes luminous
Answer: (A) The shadow generally becomes larger
16. What happens to the shadow when an object is moved closer to the screen while the light source remains fixed?
(A) The shadow generally becomes smaller
(B) The shadow always becomes larger
(C) The shadow disappears completely
(D) The screen becomes transparent
Answer: (A) The shadow generally becomes smaller
17. What is reflection of light?
(A) The bouncing back of light from a surface
(B) The absorption of all light by an object
(C) The production of light by an object
(D) The bending of sound waves
Answer: (A) The bouncing back of light from a surface
18. Which surface generally produces regular reflection?
(A) Smooth and polished surface
(B) Rough wall
(C) Uneven stone
(D) Crumpled paper
Answer: (A) Smooth and polished surface
19. Which of the following is a good reflector of light?
(A) Plane mirror
(B) Rough cloth
(C) Wooden board
(D) Cardboard
Answer: (A) Plane mirror
20. What type of image is generally formed by a plane mirror?
(A) Virtual and erect
(B) Real and inverted
(C) Always smaller and inverted
(D) Always real and enlarged
Answer: (A) Virtual and erect
21. What is lateral inversion?
(A) The apparent left-right reversal of an image in a plane mirror
(B) The change in size of an object
(C) The change in brightness of a source
(D) The formation of a shadow
Answer: (A) The apparent left-right reversal of an image in a plane mirror
22. Why does the Moon appear bright even though it is not a luminous object?
(A) It reflects sunlight towards our eyes
(B) It produces its own light
(C) It absorbs all sunlight
(D) It is made of a luminous material
Answer: (A) It reflects sunlight towards our eyes
23. Which of the following is an example of reflection of light?
(A) Seeing your image in a mirror
(B) Seeing through clear glass
(C) Formation of a shadow behind an opaque object
(D) A bulb producing light
Answer: (A) Seeing your image in a mirror
24. If the light source, object and screen are not properly aligned, what may happen?
(A) A clear shadow may not form on the screen
(B) The object will become luminous
(C) The screen will produce light
(D) The light source will stop working
Answer: (A) A clear shadow may not form on the screen
25. Which statement correctly describes shadows and reflection?
(A) A shadow forms when an opaque object blocks light, while reflection occurs when light bounces back from a surface
(B) A shadow is produced only by luminous objects
(C) Reflection occurs only when light passes through an opaque object
(D) Shadows and reflections are exactly the same phenomenon
Answer: (A) A shadow forms when an opaque object blocks light, while reflection occurs when light bounces back from a surface
