Question

a ray incident on a plane mirror is reflected in a direction such that the angle between the incident and reflected ray is 90degree. what are the angles of incident and reflection?

Answer 1

according to law of reflection,

angle of incidence = angle of reflection.

Let angle of incidence = x°

angle of reflection = x°

a/c to question,

angle between the incident rays and reflected rays is 90° { Given }

so, x° + x° = 90°

or, 2x = 90°

or, x = 90/2 = 45°

hence, angle of incidence and angle of reflection are both 45° each.

Answer 2

Hey there!

Answer:

Angle of incidence = Angle of reflection = 45°

Step-by-step Explanation:

Let the angle of incidence be x°.

Then angle of reflection = x°       (∵ Angle of incidence = angle of reflection)

Given,

The angle b/w incident ray and reflected ray = 90°

x° + x° = 90°

2x° = 90°

x = 45°

Angle of incidence = Angle of reflection = 45°

Hope It helps You!