Question

In the adjacent figure, AO and OB are incident and reflected rays respectively angle ∠AOB = 90°. Find the values of angle of incidence and angle of reflection.

Answer 1

We know that angle of incidence is equal to angle of reflection. 

i = r …….. (1)

From the figure, ∠AOB indicates i + r = 90°

From (1)

⇒ i + i = 90° 

2i = 90° 

⇒ i = 90/2 = 45° 

⇒ i = r = 45° 

Angle of incidence i = 45°; Angle of reflection r = 45°.