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Light travels through a glass plate of t...

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/(muc)`

B

`tmuc`

C

`(mut)/c`

D

`(tc)/(mu)`

Text Solution

Verified by Experts

The correct Answer is:
D
`mu=""_(a)mu_(m)=("Velocityof light in a")/("Velocity of light in m")=(V_a)/(V_m)`
`impliesV_(m)=(V_a)/(mu)=C/(mu)`
`"Time for traversing a thickness"`
`t.=t/(V_m)=(mut)/C" "[Here,t=time]`
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