1. Colour of light is characteristic of

2. Dispersion of light is caused by

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

4. In total internal reflection

5. In myopia, image is formed

6. Luminous body is

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

8. In critical angle

9. Time to reach the earth by sun is

10. Average wavelength of light is

11. The refractive index of glass is

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

13. The critical angle of water is

14. Group of light rays are called

15. Which is visible ?

16. Pigment produced by infrared ray is

17. Speed of light is represented by

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

19. The unit of magnification is

20. The velocity of light in medium like glass is

21. Which of the following has minimum wavelength?

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

23. Which of the following has maximum wavelength?

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

25. The value of near point is

26. The unit power of lens

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

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

29. How many lenses are arranged in terrestrial telescope?

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

31. The process of bending of light ray is called

32. The critical angle of diamond is

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

34. Wavelength of red colour is

35. Light pipe is used in

36. The path through which light travels is

37. Light pipe is based on

38. Persistence of vision is

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

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

41. The critical angle of ice is

42. The refraction index of diamond is

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

44. Magnification is equal to

45. Rainbow is based on

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

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

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

49. Compound microscope consists of

50. Ultraviolet ray produces

51. Twinkling of star is due to

52. In reflection,

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

54. A mirror has one focus but a lens has

55. Power of lens

56. Cutting diamond shows

57. Focal length of eyepiece lens in compound microscope is

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

59. Wavelength of violet colour is

60. Which mirror is used for shaving ?

61. The critical angle of glass is