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Question
The speed of light in glass is 2 × 105 km/s. What is the refractive index of glass?
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Solution
Given: Speed of light in glass = 2 × 105 km/s = 2 × 108 m/s
Refractive index of glass is
`mu_"glass" = (3 xx 10^8)/(2xx10^8)`
= 1.5
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