Angle of incidence

The video tutorial explains the concept of reflection, focusing on how a ray or beam reflects off a surface. It introduces the angle of incidence, defined as the angle between the incoming ray and a line perpendicular to the surface. The tutorial then covers the law of reflection, stating that the angle of incidence is equal to the angle of reflection.

What happens when a ray or beam hits a surface?

• It gets absorbed by the surface.

• It disappears.

• It reflects off the surface.

• It passes through the surface.

What is the angle of incidence?

• The angle between the incident ray and the reflected ray.

• The angle between the incident ray and a line perpendicular to the surface.

• The angle between the incident ray and a line parallel to the surface.

• The angle between the reflected ray and the surface.

Which line is used to measure the angle of incidence?

• A line parallel to the surface.

• A line perpendicular to the surface.

• A line at a 90-degree angle to the surface.

• A line at a 45-degree angle to the surface.

According to the law of reflection, how does the angle of incidence compare to the angle of reflection?

• The angle of incidence is unrelated to the angle of reflection.

• The angle of incidence is greater than the angle of reflection.

• The angle of incidence is less than the angle of reflection.

• The angle of incidence is equal to the angle of reflection.

What does the law of reflection state about the angles involved?

• The angles are always different.

• The angles are equal.

• The angles are complementary.

• The angles are supplementary.