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Light travels through a glass plate of thickness t and having refractive index n . If c is the velocity of light in vacuum, the time taken by the light to travel this thickness of glass is
A. `(t)/(nc)`
B. `tnc`
C. `(nt)/(c)`
D. `(tc)/(n)`

1 Answer

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Best answer
Correct Answer - C
Speed of light in medium `v=c//n`
Time to travel a distance, `t_0=t/v=(t)/(c//n)=(nt)/(c)`

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