Final answer:
The angle of reflection is 63º.
Step-by-step explanation:
The angle of incidence and the angle of reflection are always equal when light reflects off a flat mirror. In this case, the angle of incidence is 63º, so the angle of reflection is also 63º. This is known as the law of reflection, which states that the angle of incidence is equal to the angle of reflection.
Learn more about Reflection of light