A ray of light hits the surface of a mirror at an incident angle of 10º to the normal. What is the angle of reflection for the ray of light?

Yes, if you measure both to the normal.

The angle of reflection is going to be 30

The angle of incidence equals the angle of reflection = 10º

I'm Batman

Yes, you are correct in saying that the angle of incidence equals the angle of reflection for a ray of light hitting a mirror. However, in this case, the incident angle is given as 10º to the normal. The angle of incidence is always measured relative to the normal, which is an imaginary line perpendicular to the surface of the mirror at the point of incidence.

Since the incident angle is given as 10º to the normal, the angle of reflection will also be 10º. In this scenario, the ray of light will be reflected back along the same path but on the opposite side of the normal.