A ray of light on entering from medium ‘a’ to medium ‘b ’ does not suffer refraction. The angle of incidence in medium ‘a ’ is :
A. 90°
B. zero
C. 45°
D. 60°
Answer:B
A ray of light on entering from medium ‘a’ to medium ‘b ’ does not suffer refraction. The angle of incidence in medium ‘a ’ is :
A. 90° B. zero C. 45° D. 60°