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If the critical angle for total internal...

If the critical angle for total internal reflection from a medium to vacuum is `30^(@)`, the velocity of light in the medium is

A

`3 xx 10^(8)` m/s

B

`1.5 xx 10^(8)` m/s

C

`6 xx 10^(8)` m/s

D

`sqrt(3) xx 10^(8)` m/s

Text Solution

Verified by Experts

The correct Answer is:
B
n`= (1)/(sini_(c )) = (1)/(sin 30^(@)) = 2 `
`therefore " "v = (3 xx 10^(8))/(2) = 1.5 xx 10^(8) `m/s.
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