Reflection and Angles in Optics

What does the Law of Reflection state about the angle of incidence and the angle of reflection?

• They are always complementary.

• They are always supplementary.

• They are always equal.

• They are always perpendicular.

How is the normal line oriented with respect to the surface it intersects?

• It is parallel to the surface.

• It is perpendicular to the surface.

• It forms a 45-degree angle with the surface.

• It is tangent to the surface.

How is the angle of incidence measured?

• Between the incident light ray and the surface.

• Between the reflected light ray and the surface.

• Between the incident light ray and the normal line.

• Between the reflected light ray and the normal line.

A light ray strikes a flat mirror at an angle of 30 degrees from the horizontal surface. What is the angle of reflection for this ray?

• 30 degrees

• 60 degrees

• 90 degrees

• 120 degrees