The critical angle of incidence in a glass slab immersed in a air is 30°. What will be the critical angle when it is immersed in a medium of refractive index √2?

The critical angle of incidence in a glass slab immersed in a air is 3

1.	The critical angle of incidence in a glass slab immersed in a air is 30°. What will be the critical angle when it is immersed in a medium of refractive index √2?
A.	75°
B.	30°
C.	45°
D.	60°
Answer» D. 60°