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A parallel beam of monochromatic light i...

A parallel beam of monochromatic light is incident at one surface of a equilateral prism. Angle of incidence is `55^(@)` and angle of emergence is `46^(@)`. The angle of minimum deviation will be

A

`30^(@)`

B

`60^(@)`

C

`50^(@)`

D

`100^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A
Since, deviation `delta = i+ e - A `
`rArr " " delta = 55^(@) + 46^(@) - 60^(@) = 41^(@)`
For minimum deviation i= e
`delta lt 41^(@). " as" delta_(m) lt delta `
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