Angle of Incidence in Reflection

Steps:

• Locate the incident ray: the light ray traveling toward the mirror.
• Identify the normal: the line perpendicular to the mirror at the incidence point.
• Find the angle between the incident ray and the normal.
• Label this angle as the angle of incidence.

Why B is correct:

• B measures the angle between the incident ray and the normal, matching the definition in the law of reflection.

Why the others are wrong:

• A is the angle between the incident ray and the mirror surface.
• C is the angle of reflection, between the reflected ray and the normal.
• D is the angle between the reflected ray and the mirror surface.

Final answer: B