In the figure below a ray of light travelling in a medium of refractive index µ passes through two different connected rectangular blocks of refractive indices µ1 and µ2 (µ2 > µ1).
The angle of incidence θ1 is increased slightly. The angle θ2
(A) increases.
(B) decreases.
(C) remains the same
(D) increases or decreases depending on the value of (µ1 /µ2)
Correct option: (B) decreases