Question

The refractive index of glass with respect to air is 2. Then the critical angle of glass-air interfaceis .................. [ ]
a) 0°
b) 45°
c) 30°
d) 60°

Answer 1

Answer:

Explanation:

sin IC =1/refractive index

so, critical angle is 30degrees

Answer 2

Explanation:

critical angle is of 30°