The refractive indices of three media are given below. Medium A B C Refractive index 1.65 1.71 1.47 A ray of light is travelling from A to B and another ray is travelling from B to C. In which case a) the refracted ray bends towards the normal b) the speed of light increases in the second medium?
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a) the ray of light bends towards the normal in a to b
b) in second case
b) in second case
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Given that,
Refractive index of medium A, B and C are 1.65, 1.71 and 1.47.
To find,
In which case (a) the refracted ray bends towards the normal b) the speed of light increases in the second medium?
Solution,
(A) If light travels enters into a substance with a lower refractive index, the light bends away from the normal line. It means that if the light travels enters into a substance with a higher refractive index, the light bends towards the normal line. Hence, in medium B the refracted ray bends towards the normal.
(B) Refractive index is inversely proportional to the speed of light in the medium. So, in medium C the speed of light increases in the second medium.
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Refractive index
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