Question

1. A ray is incident on a plane mirror. Its reflected ray is
perpendicular to the incident ray. Find the angle of
incidence.​

Answer 1

Answer:

okay dear

Explanation:

The angle of incidence is equal to 45 degrees.

It is given that, Its reflected ray is perpendicular to the incident ray. According to the law of reflection, the angle of incidence is equal to the angle of reflection. So, the angle of incidence is equal to 45 degrees.21-Feb-2017

Answer 2

Given : reflected ray is perpendicular to incident ray

That is to say , i+r=90

∘

We know from the law of reflection that i=r ( angle of incidence = angle of reflection)

i+i=90

⇒2i=90

⇒i=r=45

∘

Given : reflected ray is perpendicular to incident ray

That is to say , i+r=90

∘

We know from the law of reflection that i=r ( angle of incidence = angle of reflection)

i+i=90

∘

⇒2i=90

⇒i=r=45 Given : reflected ray is perpendicular to incident ray

That is to say , i+r=90

We know from the law of reflection that i=r ( angle of incidence = angle of reflection)

i+i=90

⇒2i=90

⇒i=r=45