Question

The angle of incidence is the angle between:

Options

• The incident ray and the reflecting surface

• The incident ray and the normal

• The incident ray and the reflected ray

• The incident ray and the principal axis

Answer 1

The angle of incidence is defined as the angle between the incident ray and the normal to the reflecting surface at the point of incidence. It is not measured with respect to the surface itself, the reflected ray, or the principal axis.