Front

What is the law of reflection?

Back

The law of reflection states that when a light ray strikes a reflective surface, the angle of incidence is equal to the angle of reflection.

Front

What is refraction?

Back

Refraction is the bending of light waves as they pass from one medium to another, caused by a change in speed.

Front

What happens to light when it travels from air to water?

Back

When light travels from air to water, it slows down and bends toward the normal line.

Front

What is the normal line in optics?

Back

The normal line is an imaginary line perpendicular to the surface at the point of incidence where light strikes.

Front

What is the speed of light in a vacuum?

Back

The speed of light in a vacuum is approximately 299,792 kilometers per second (km/s).

Front

How does the angle of incidence relate to the angle of reflection?

Back

The angle of incidence is equal to the angle of reflection, measured from the normal line.

Front

What is total internal reflection?

Back

Total internal reflection occurs when light hits a boundary at an angle greater than the critical angle, causing it to reflect entirely back into the medium.

Front

What is the critical angle?

Back

The critical angle is the angle of incidence above which total internal reflection occurs.

Front

What is dispersion of light?

Back

Dispersion of light is the separation of light into its component colors due to different degrees of refraction.

Front

What is a medium in the context of waves?

Back

A medium is a substance through which a wave travels, such as air, water, or glass.