Lights - Reflection, Refraction, Dispersion, Colours

True/False: The angle of reflection is always equal to the angle of incidence on a plane mirror.

The line drawn perpendicular to the surface at the point of incidence is called the ________.

A ray of light hits a plane mirror at an angle of 30° to the normal. What is the angle of reflection?

• 30°

• 60°

• 90°

A ray diagram has an incident ray at an angle of 40° with the normal on a mirror. What is the angle of reflection?

• 40°

• 42°

• 41°

A plane mirror always forms a real image.
True or False

When light passes from air to glass, it _______ and bends _______ the normal.

• Moves faster, away

• Slows down, towards

• Slows down, away

• Moves faster, towards

When light passes from water to air, the angle of refraction is:

• Greater than the angle of incidence

• Equal to the angle of incidence

• Less than the angle of incidence

A light ray passing from air into water, bending toward the normal What happens to the speed of light as it enters the water?

• Increases

• Decreases

• Remains the same

Refraction occurs because the speed of light changes as it moves between different materials.
True or False

The splitting of white light into its component colours by a prism is called ________.