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A ray of light is incident normally on o...

A ray of light is incident normally on one of the faces of a prism of apex angle 30 degree and refractive index sqrt2. The angle of deviation of the ray is…degrees.

Text Solution

Verified by Experts

Apply Snell’s law of refraction at P
`(sin30^@)/(sinr)=1/sqrt(2)`
or `sinr=sqrt(2) xx1/2=1/sqrt(2) =sin45^@` or `r=45^@`
`:. Delta=r-30^@=45^@ - 30^@=15^@`
`:.` Deviation of ray = `15^@`
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