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The critical angle for total internal re...

The critical angle for total internal reflections, from a medium to vacuum is `30^@`. Then velocity of light in the medium is:

A

`3 xx10^(8) ms ^(-1)`

B

`1.5 xx10^(8) ms ^(-1)`

C

`6 xx10^(8) ms ^(-1)`

D

`sqrt(3) xx10^(8) ms ^(-1)`

Text Solution

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The correct Answer is:
B
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