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A monochromatic light is incident at ...

A monochromatic light is incident at a certain angle on an equilateral triamgular prism and suffers minimum deviation . If the refractive index of the material of the prism is `sqrt(3)`, them the angle of incidence is :

A

`45^(@)`

B

`60^(@)`

C

`90^(@)`

D

`30^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
For minimum deviation
`r _(1) = r_(2) = A/2 `
also, `sin I =mu sin r _(1)`
` implies sin I = sqrt3 sin 30^(@)`
`or I = 60^(@)d`
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