1. What is the phenomenon of bouncing back of light from a surface called?
2. Which surface reflects light the best?
3. Which of the following is a luminous object?
4. What type of image is formed by a plane mirror?
5. Which part of the eye controls the amount of light entering it?
6. Which part of the eye focuses light on the retina?
7. Light travels in:
8. What kind of mirror is used in rearview mirrors of vehicles?
9. Which mirror is used by dentists?
10. Which part of the eye is sensitive to light?
11. The image formed by a pinhole camera is:
12. When light passes from air to glass, it:
13. A periscope uses:
14. Which objects allow light to pass through them completely?
15. What causes shadows to form?
16. The splitting of white light into its constituent colors is called:
17. In which medium does light travel fastest?
18. Which type of lens is used in magnifying glasses?
19. The angle between the reflected ray and the normal is called:
20. Which type of mirror always forms virtual and diminished images?
21. Which cells in the eye help to see in dim light?
22. Which instrument works on the principle of multiple reflections?
23. The most sensitive part of the eye is:
24. The center of a mirror is known as:
25. Which mirror gives a virtual image of the same size as the object?
26. Which mirror is used in torches?
27. Which surface gives a diffused reflection?
28. How is a rainbow formed?
29. What allows light to enter the eye?
30. The direction of light can be changed using a:
31. Blind spot in the eye is where:
32. What helps the eye to adjust to bright or dim light?
33. Which lens is thinner in the center than at the edges?
34. What happens to light when it hits a smooth, shiny surface?
35. Which property of light is responsible for formation of shadows?
36. Which part of the eye helps in focusing light?
37. Why can't we see in a completely dark room?
38. Which device shows light travels in a straight line?
39. The color seen at the top of a rainbow is:
40. The color seen at the bottom of a rainbow is: