51. The phenomenon of change in direction of light when it passes from one medium to another is called
52. The refractive index of a transparent medium is maximum for
53. What type of lens is a magnifying glass?
54. Which of the following is not caused by atmospheric refraction of light ?
55. Why does water tank appear shallower when viewed from the top?
56. Which one of the following processes is responsible for the glittering of air bubble rising through water?
57. The increasing order of the refractive index of certain materials is (left to right) ________
58. Which color deviates least when passing through a Prism
59. Which color deviates highest when passing through a Prism
60. A pond of water appears less deep due to
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