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In an equilateral prism if incident angl...

In an equilateral prism if incident angle is 45 then minimum deviation is……

A

`30^@`

B

`60^@`

C

`45^@`

D

`90^@`

Text Solution

Verified by Experts

The correct Answer is:
A
`i+e=A + delta`
But when `i=e implies delta=delta_m`
`therefore 2i=A+delta_m`
`therefore delta_m=2i-A=2 times 45^@-60^@=30^@`
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