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The refractive index of a prism for a mo...

The refractive index of a prism for a monochromatic wave is `sqrt(2)` and its refracting angle is `60^(@)` for minimum deviation, the angle of indidence will be

A

`30^(@)`

B

`45^(@)`

C

`60^(@)`

D

`75^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
(b) Refractive index,
`µ=(sin i)/(sinA//2)`
`rArr sqrt2=(sini)/(sin(60^(@)//2))orsqrt2xxsin30^(@)=sin i`
`or sqrt2xx1/2=sinirArri=45^(@)`
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