Question

A wave is incident on the surface of a mirror at an angle of 30° with the normal. At what angle will the outgoing wave reflect?

Answer 1

the angle of reflection is equal to the angle of incidence there it will be reflected at an angle of 30 degrees from the normal

Answer 2

One of the laws of reflection is that angles of incidence and of reflection are the same, there the reflected angle should be 30degrees.