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A ray of light is incident on one face o...

A ray of light is incident on one face of a prism at an angle of `50^(@)` with the normal . The ray is deviated by the prism through `42^(@)` . What is the angle of the prism , if the angle of emergence is `51^(@)` ?

A

`56^(@)`

B

`57^(@)`

C

`58^(@)`

D

`59^(@)`

Text Solution

Verified by Experts

The correct Answer is:
D
`i= 50^(@) , e = 51^(@) , delta = 42^(@)`
For a prism , `i+ e = A + delta`
`therefore A = i+ e - delta = 50^(@) + 51^(@) - 42^(@) = 59^(@)`
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