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A light ray from air is incident (as sho...

A light ray from air is incident (as shown in figure ) at one end of a glass fiber ( refractive index `mu=1.5)` making an incidence angle of `60^(@)` on the lateral surface, so that it undergoes a total internal reflection. How much time would it take to traverse the straight fiber of length `1 km `?

A

`3.33 mu sec`

B

`6.67 mu sec`

C

`5.77 mu sec`

D

`3.85 mu sec`

Text Solution

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The correct Answer is:
d
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