Question

the critical angle for a given medium is 30°. What is the refractive index of the medium if rarer medium is air​

Answer 1

Answer:

hope it will help you

Explanation:

Solution :

According to Brewster's law,

μ=tanp …(i)

Also, μ=1sinC …(ii)

From (i) and (ii), tanp=1sinC.

If r is angle of refraction, then p=90∘−r

∴tan(90∘−r)=cosr=1tanr=1sinC

or tanr=sinC∴r=tan−1(sinC)