A ray of light passes through an equilat...

A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to `3//4` of the angle of the prism. The angle of deviation is

`45^@`

`39^@`

`20^@`

`30^@`

Text Solution

Verified by Experts

The correct Answer is:

`i=e=3/4A`
`i=e=3/4xx60^@`
`i=45^@`
`delta_"min"=2i-A`
`=2xx45-60=30^@`

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