Question

What are the values of a. the angle of incidence and b. the angle of reflection for normal incidence on a plane mirror surface?

Answer 1

• The angle of incidence is the angle between the incident ray and the normal at the point of incidence.
• If an incidence ray is normal to a surface that means the angle of incidence is $0^o$.
• According to the law of reflection, the angle of incidence is equal to the angle of reflection.
• So the angle of reflection is also $0^o$.

Final answer - For normal incidence on a plane mirror, angle of incidence and angle of reflection are $0^o$.