Question

A ray of light is incident on plane mirror at angle of 40 degree what is angle ofreflection

Answer 1

Answer:

The angle of reflection is 50°

Explanation:

This is because the ray of light makes and angle of 40° with the mirror,

Then the ∠i = 90 - 40

                   =50°

And we know that ∠i=∠r

Hence ∠r=50°

Answer 2

Answer:

90-40=50degrees