Question

what is the term for the angle at which light comes in before reflecting, as shown in the image (angle a)?
angle of diffusion
angle of incidence
angle of reflection

Explanation:

• The angle of incidence is defined as the angle between the incoming light ray (the incident ray) and the normal (a perpendicular line to the reflecting surface at the point of incidence).
• The angle of reflection is the angle between the reflected ray and the normal.
• The term "angle of diffusion" is not a standard term in the context of basic light reflection concepts.

Answer:

Angle of incidence