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A driver at a depth 12 m inside water (m...

A driver at a depth 12 m inside water `(mu = 4//3)` see the sky in a cone of semi-vertical angle is

A

`sin^(-1)((4)/(3))`

B

`tan^(-1)((4)/(3))`

C

`sin^(-1)((3)/(4))`

D

`90^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A, C, D
Required semi vertical angle = Critical angle `i_(c ) -= sin^(-1) (1)/(mu)sin^(-1)((3)/(4))`
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