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Class 7 Science Chapter 11 Light Quiz 39 (25 MCQs)

Quiz Instructions

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1. Light is a type of energy that can be sensed with the
2. The radius of curvature of a convex lens is 20cm. What is its focal length?
3. When the sun gets higher in the sky, shadows get .....
4. What percentage of colors makes white light?
5. Something that separates white light into colors is a/an
6. An object that allows light to pass to through it completely, is known as-
7. The impression of an image does not vanish immediately from the retina.It persits there for about ..... of a second.
8. Lens
9. Faint part of the shadow is .....
10. Refraction is the bending of a wave disturbance as it passes from one ..... into another.
11. The phenomena of bending light is?
12. I am used in magnifying glass, Image forme dby me is magnified, Who am I
13. The Sun is a massive ball of fire. It is the major source of light for the earth
14. A virtual image larger than the object may be produced by an?
15. A material that allows SOME light to pass through it.
16. Which is transparent?
17. Lens that focuses on light
18. C4 plants initially fix carbon dioxide in bundle sheath as 4 carbon long compounds then transported to mesophyll cells to undergo Calvin cycle.
19. A shadow only shows the ..... of an object.
20. We can obtain an enlarged and erect image by a convex mirror. (T/F)
21. A mirror always form diminished image irrespective of the position of the object in-front of it, then the mirror is:-
22. The bouncing of light off an object
23. Light travels in a straight line
24. Sunlight is a mixture of electromagnetic waves, ranging from infrared to ultraviolet. Which of the following types of electromagnetic radiation has the longest wavelengths?
25. A lion's roar is a ..... pitch sound.
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