Question

01
What is the angle of incidence of a ray, if both the reflected and incident rays are
perpendicular to each other?
0
45
90
180​

Answer 1

Answer:

The angle of incidence is the angle between this normal line and the incident ray; the angle of reflection is the angle between this normal line and the reflected ray. According to the law of reflection, the angle of incidence equals the angle of reflection.

So, i=r

Given, i+r=90

0

⟹ i+i=90

0

or, 2i=90

0

or, i=45