Question

What will be the angle of reflection if a ray of light strikes a place mirror at an angle of 90°

Answer 1

Answer : 0°

Explanation : We know that, In plane mirrors and curved surfaces , When reflection takes place, Angle of reflection = Angle of incidence.

Let's look a bit deep into what is Angle of incidence?

If a ray strikes a mirror, The angle made by the ray with the normal ( perpendicular line to the surface of mirror) is known as angle of reflection.

Here, In this case, A ray of light strikes the mirror at an angle of 90° , So it means both normal and incident ray coincide. This gives us, Angle of incidence = 0°

The ray of light must obey laws of reflection, Hence Angle of incidence = Angle of reflection = 0°

Therefore, If a ray of light strikes a place mirror at an angle of 90° , then angle of reflection is 0°

Answer 2

hey your answer goes like this


If any light ray incident on a plane mirror at an angle 90* then the light ray woll be deflected and the mirror will absorb the light so there is no chance for the light to be reflected

By this we can conclude that

if a ray of light strikes a plane mirror at an angle of 90° then angle of reflection = 0*

refer to the diagram from more clarity

thanks