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The critical angle for a light travellin...

The critical angle for a light travelling from medium A into medium B is `theta`. The speed of light in medium A is v, the speed of light in medium B is

A

`v/(sin theta)`

B

`v sin theta`

C

`v cot theta`

D

`v tan theta`

Text Solution

Verified by Experts

The correct Answer is:
A
`n_(A) sin theta=n_(B) sin 90^(@)`
`V=C/(n_(A))`
`V_(B)=C/(n_(B))`
`V_(B)=C/(n_(A) sin theta)=V/(sin theta)`
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