MCQ Questions for Class 6 Science: Ch 11 Light, Shadow and Reflections

MCQ Questions for Class 6 Science: Ch 11 Light, Shadow and Reflections

1. ____________ help us to see the objects.
(a) Reflection
(b) Light
(c) Opaque objects
(d) Transparent objects
► (b) Light

2. Light is a form of
(a) Length
(b) Energy
(c) Mass
(d) Power
► (b) Energy

3. The speed of light is
(a) 299,792 km/s.
(b) 299,792 m/s
(c) 29,792km/s
(d) 29,792 m/s
► (a) 299,792 km/s.

4. The light from the sun reaches the earth in
(a) 8 minutes and 20 seconds
(b) 8.33 seconds
(c) 18.33 minutes
(d) 88.33 seconds
► (a) 8 minutes and 20 seconds

5. 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.
► (d) Can be smaller or bigger than the opaque body.

6. Which of the following is not a luminous object
(a) Unlit candle
(b) Burning gas lantern
(c) Glow worm
(d) Sun
► (a) Unlit candle

7. A plane mirror reflects a pencil of light to form a real image. Then the pencil of light incident on the mirror is
(a) Parallel
(b) Convergent
(c) Divergent
(d) None of these
► (b) Convergent

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

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

10. The star which is very bright during early evening
(a) Jupiter
(b) Mercury
(c) Venus
(d) Saturn
► (c) Venus

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

12. Megha placed a stick in the playground at 8:15 am in the morning. How will the shadow of the stick at 12:00 noon be in comparison to the one at 8:15 am?
(a) It will be shorter than one at 8:15 am.
(b) It will be same as one at 8:15 am.
(c) It will be greater than one at 8:15 am.
(d) Shadow will not form at 12:00 noon.
► (a) It will be shorter than one at 8:15 am.

13. Which of the following will not form circular shadow
(a) Shoe box
(b) A ball
(c) A circular disk
(d) Ice-cream cone
► (a) Shoe box

14. 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
► (a) Light travels in straight lines

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

16. Utkarsh puts some water into four cups made of steel, porcelain, glass, frosted glass. Which one of these cups will allow him to see the level of the water clearly?
(a) Glass cup
(b) Steel cup
(c) Porcelain cup
(d) Frosted glass cup
► (a) Glass cup

17. All planets are
(a) Luminous during day
(b) Non-luminous body
(c) Non-luminous during night
(d) Luminous body
► (b) Non-luminous body

18. When Sahil looked at a lighted torch through an object he could see a faint glow, but not the torch. The object is
(a) Transparent
(b) Opaque
(c) Translucent
(d) None of these
► (c) Translucent

19. To see a shadow we need
(a) A source of light and translucent object
(b) A source of light and transparent object
(c) A source of light and an opaque object
(d) Many source of light and opaque object
► (c) A source of light and an opaque object

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

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

22. A solid transparent sphere has a small opaque dot at its centre. When observed from outside, the apparent position of the dot will be
(a) Closer to the eye than its actual position.
(b) The same as its actual position.
(c) Farther away from the eye than its actual position.
(d) None of these.
► (b) The same as its actual position.

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

24. Which of the following explains why air is not visible?
(a) It is nearly a perfect transparent substance.
(b) It transmits whole of light.
(c) It neither absorbs nor reflects light.
(d) All of these.
► (d) All of these.

25. In the morning, when the sun rises in the east, your shadow will be seen on the
(a) North
(b) West
(c) South
(d) East
► (b) West
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