Question

what is angle if incidence when a ray of light is incident normally on a plane mirror​

Answer 1

Answer:

0degrees

Explanation:

When a ray of light is incident normally , the angle is 90°, incident angle will be 0 degrees

Answer 2

Answer:

Explanation:

For a plane mirror: If the incident ray falls along the normal, the angle of incidence is 0 degrees, NOT 90 degrees. The angle is measured with the normal to the mirror and not with the plane of the mirror. Hence the angle of reflection is equal to 0 degrees.