1. The unit power of lens

2. In total internal reflection

3. The refraction index of diamond is

4. The focal length of a convex lens will be maximum for

5. Which of the following has maximum wavelength?

6. The incident ray making an angle to the surface is called

7. Magnification is equal to

8. Speed of light is represented by

9. In myopia, image is formed

10. Group of light rays are called

11. Twinkling of star is due to

12. Wavelength of red colour is

13. The path through which light travels is

14. When light rays passes from denser to rarer medium then light rays

15. The critical angle of glass is

16. Which mirror is used for shaving ?

17. The refractive index of glass is

18. Average wavelength of light is

19. In reflection,

20. Time to reach the earth by sun is

21. Colour of light is characteristic of

22. If the angle between incident ray and reflected ray is 120⁰ then find the value of angle of reflaction.60

23. People can’t succeed ta catch the fish inside the pond due to

24. Light pipe is based on

25. Which of the following compound is used in camera to make photo negative?HNO

26. Pigment produced by infrared ray is

27. A mirror has one focus but a lens has

28. The critical angle of water is

29. Dispersion of light is caused by

30. Wavelength of violet colour is

31. The critical angle of ice is

32. The critical angle of diamond is

33. The process of bending of light ray is called

34. In critical angle

35. Rainbow is based on

36. Cutting diamond shows

37. When ray of light enters a glass slab from air

38. When light strikes on some objects it returns back on same medium is called

39. When object is placed at 2F of convex lens then 2F

40. In light spectrum, the colour with longest wavelength is

41. To remove myopia or short sightedness _____ should be used .

42. The minimum distance between an object and its real image formed by a thin convex lens of focal length f is

43. In light spectrum, the colour with highest frequency is

44. If focal length of concave lens is 4 cm then find its power of lens.

45. Power of lens

46. The velocity of light in medium like glass is

47. The velocity of light is in vacuum or air is

48. The unit of magnification is

49. Which is visible ?

50. Compound microscope consists of

51. How many lenses are arranged in terrestrial telescope?

52. Focal length of eyepiece lens in compound microscope is

53. Which of the following has minimum wavelength?

54. When object is placed at 2F of convex lens then 2F

55. To remove hypermetropia or long sightedness, which lens is used ?

56. Light pipe is used in

57. Ultraviolet ray produces

58. Water is seen on the black pitched road during summer season due to

59. Persistence of vision is

60. The value of near point is

61. Luminous body is