A ray of light travelling in glass (mu=3//2) is incident on a horizontal glass air surface at the critical angle theta_(C). Ifa thin layer of water (mu=4//3) is now poured on the glass air surface, the ray of light emerge into airat the water air surface at an angle of pi//k, radians find the value of k.

A ray of light travelling in glass (mu=3//2) is incident on a horizont

1.	A ray of light travelling in glass (mu=3//2) is incident on a horizontal glass air surface at the critical angle theta_(C). Ifa thin layer of water (mu=4//3) is now poured on the glass air surface, the ray of light emerge into airat the water air surface at an angle of pi//k, radians find the value of k.
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