Question

What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray

Answer 1

Hii there!!

Since, ray of incidence makes a angle of 90° with the reflected ray.
=)Angle of incidence=90/2 =45 °



Hope it helps

Answer 2

Incident ray =

Ray travelling in the first medium and falling on the surface separating two medium is called incident ray.