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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

`41^@`

B

`lt41^@`

C

`gt47^@`

D

`gt41^@`

Text Solution

Verified by Experts

The correct Answer is:
B
`A=60^@, i=55^@, i^'=45^@`
`delta=(i+i^')-A=(55+46)-60=41^@`
`delta_m lt delta` i.e. `delta_m lt 41^@`
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