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Question

Light enters from air to dense flint glass with a refractive index of 1.65. What will be the speed of light in flint glass?


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Solution

Step-1: Given

The refractive index of flint glass, n = 1.65

The speed of light in air, c = 3×108ms

The speed of light in flint glass, v =?

Step-2: Calculation

Calculating the speed of light in flint glass,

The refractive index, n=cv

1.65=3×108vv=3×1081.65v=1.81×108ms

Hence, the speed of light in flint glass is 1.81×108ms.


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