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A fish looks upward at an unobstructed o...

A fish looks upward at an unobstructed overcast sky. What total angle does the sky appear to subten?(Take refractive index of water as `sqrt(2).)`

A

`180^@`

B

`90^@`

C

`75^@`

D

`60^@`

Text Solution

Verified by Experts

The correct Answer is:
B
`mu=1/(sinc)` , vertex angle=2c
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NARAYNA-RAY OPTICS AND OPTICAL INSTRAUMENTS -EXERCISE-2 (H.W)(REFRACTION)
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  14. A light ray is incident perpendicularly to one face of a 90° prism and...

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  15. Word ‘Newton’s printed on a paper and is placed on a horizontal surfac...

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