CBSE Class 6 Science Light Shadows and Reflections MCQs

1. Mist is a
(a) Translucent medium
(b) Transparent medium
(c) Opaque medium
(d) Homogenous medium

Answer : A

2. Wool is a
(a) Transparent medium
(b) Opaque medium
(c) Translucent medium
(d) Optical medium

Answer : B

3. Stars are
(a) Non luminous bodies
(b) Luminous bodies
(c) Artificial sources of light
(d) Opaque bodies

Answer : B

4. Moons and planets
(a) Radiate light energy
(b) Reflect light energy
(c) Absorb light energy
(d) Split light energy

Answer : B

5. Vacuum is a
(a) Opaque medium
(b) Transparent medium
(c) Translucent medium
(d) Heterogenous medium

Answer : B

6. Rectilinear propagation of light means
(a) Light travels in straight lines
(b) Light travels in curved path
(c) Light travels in zig-zag path
(d) Light travels in circular path

Answer : A

7. A non luminous body can be made luminous by
(a) Cooling it
(b) Melting it
(c) Heating it
(d) Evaporating it

Answer : C

8. The speed of light is
(a) 300,000 km/s.
(b) 300,000 m/s
(c) 30,000 km/s
(d) 30, 000 m/s

Answer : A

9. The light from the sun reaches the earth in
(a) 8.33 minutes
(b) 8.33 seconds
(c) 18. 33 minutes
(d) 88.33 seconds

Answer : A

10. A body which emits light by itself is
(a) Luminous body
(b) Non luminous body
(c) Opaque body
(d) Shadow

Answer : A

11. The star very bright during early evening
(a) Jupiter
(b) Mercury
(c) Venus
(d) Saturn

Answer : C

12. The size of a shadow of an opaque object close to the screen and away from the source of light
(a) Increases
(b) Decreases
(c) Remains the same
(d) First decreases and increases.

Answer : B

13. This takes place from smooth polished surface when a beam of light falls on it
(a) Reflection
(b) Absorption
(c) Refraction
(d) Radiation

Answer : A

14. The image formed in pinhole camera is
(a) Inverted
(b) Erect
(c) None of these
(d) Both a and b

Answer : A

15. An optical medium having uniform composition throughout is
(a) Homogenous medium
(b) Heterogeneous medium
(c) Both a and b
(d) None of these

Answer : A

16. A dark patch formed by an opaque body placed in the path of light is called
(a) Image
(b) Object
(c) Shadow
(d) Screen

Answer : C

17. Reflection does not takes place from a
(a) Polished metal plate
(b) Mirror
(c) Undisturbed water
(d) Book

Answer : D

18. The shadow is the dark outline of
(a) An Object
(b) A Source of light
(c) A Screen
(d) An Image

Answer : A

19. Shadows are formed only when the
(a) Opaque body is in the path of the light
(b) Transparent body is in the path of light
(c) Translucent body is in the path of light
(d) No object in the path of light

Answer : A

20. This screen is a must to receive the shadow
(a) Transparent screen
(b) Opaque screen
(c) Translucent screen
(d) No screen

Answer : B

21. Luminous objects are objects
(a) Which get their light from other objects
(b) Which emit their own light
(c) Which do not emit any light
(d) Which absorb light

Answer : B

22. The smooth polished surface from which reflection takes place is
(a) Mirror
(b) Glass
(c) Wood
(d) Plastic

Answer : A

23. A red hot iron wire starts emitting light, at this time the temperature of the iron is
(a) Between 600c to 800c
(b) Between 60c to 80c
(c) Between 300c to 400c
(d) Between 150c to 250c

Answer : A

24. Shadows are
(a) Always smaller than the opaque body
(b) Always bigger than the opaque body
(c) Remains the same size as opaque body
(d) Can be smaller or bigger than the opaque body.

Answer : D

25. An example for the rectilinear propagation of light is
(a) Formation of clouds
(b) Formation of day and night
(c) Formation of rainbow
(d) Formation of rain

Answer : B

26. When the moon comes in between the sun and the earth in a straight line, then a solar eclipse is formed This formation of a solar eclipse is based on the concept of the ____. 
(a) formation of a shadow of the earth on the moon 
(b) formation of a shadow of the moon on the earth 
(c)  reflection of light by the earth 
(d) reflection of light by the moon 

Answer : B

27. Objects which emit light of their own are called ____. 
(a) luminous objects 
(b) non‐luminous objects 
(c)  opaque objects 
(d) transparent object

Answer : A

28. An inverted image is the characteristic of a ____. 
(a) Shadow 
(b) pin hole camera 
(c)  reflected image 
(d) laterally inverted image

Answer : B

29. Where is a shadow formed? 
(a) In front of the object 
(b) On the ground either in front or behind the object 
(c)  On a screen behind the object 
(d) Anywhere and every where 

Answer : C

30. The shadow of a cylinder is a rectangle when light falls in one direction, and a _____ when light falls in the other direction.
(a) Sheet 
(b)  Line 
(c)  Circle 
(d) None of the above 

Answer : C

31. Shadows are formed because ___. 
(a) Light has lot of energy 
(b) Light is attracted to a magnet 
(c) Light travels in a straight line 
(d) Light cannot travel 

Answer : C

32. Sharp Shadow is formed by 
(a) Opaque object 
(b) Translucent objects 
(c)  Transparent objects 
(d) Any object  

Answer : A

33. In a completely dark room, if you hold up a mirror in front of you, will you see 
(a) Your shadow 
(b) A sharp shadow 
(c)  Your image 
(d) No image 

Answer : D

34. Air, water, a sheet of polythene are  
(a) Transparent 
(b) Translucent 
(c)  Opaque 
(d) Luminous

Answer : A

35. The flame of a gas burner, firefly are 
(a) Transparent 
(b) Translucent 
(c) Opaque 
(d) Luminous 

Answer : D

36. Which of the following object is not luminous? 
(a) Fluorescent tube when switched on 
(b) Flame of gas burner 
(c)  Fire fly 
(d) Moon 

Answer : D

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