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A ray of light is incident at an angle o...

A ray of light is incident at an angle of incidence `45^@` on an equilateral prism and emerge at an angle `45^@` then the refractive index of the medium of the prism is:

A

2

B

`sqrt(2)`

C

`1/(sqrt(2))`

D

`sqrt(3)`

Text Solution

Verified by Experts

The correct Answer is:
B

By symmetry `r_(1)=r_(2)=30^(@) ` and by snell's law
`sin45^(@) =n sin 30^(@)`
`n=sqrt(2)`
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