A ray of light travelling in glass ( ) is incident on a horizontal glass-air surface…

PHYSICS · Subjective · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

A ray of light travelling in glass (

\mu_g=\dfrac{3}{2}

) is incident on a horizontal glass-air surface at the critical angle

\theta_c

. If a thin layer of water (

\mu_w=\dfrac{4}{3}

) is poured on the glass-air surface, at what angle does the ray emerge into water at the glass-water surface?