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A ray of light passes through a glass sl...

A ray of light passes through a glass slab of thickness t and refractive index `mu` . If the speed of light in air be 'c', the time taken by the ray to cross through the plate is _______

A

`(t)/(muc)`

B

`(tc)/(mu)`

C

`(mut)/(c )`

D

`(muc)/(t)`

Text Solution

Verified by Experts

The correct Answer is:
C
Required time = `("Optical thickness")/("Speed of light in air")`
`=(mut)/(c )`
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