5.3 Light

Front

What is light?

Back

Light is a form of energy that travels in waves and can be seen by the human eye.

Front

What happens to light when it hits a mirror?

Back

Light reflects off a mirror, changing direction but not its speed.

Front

What is the wavelength of light?

Back

The wavelength is the distance between two consecutive peaks of a wave.

Front

What is a transparent material?

Back

A transparent material allows light to pass through it without scattering, like clear glass.

Front

What is a translucent material?

Back

A translucent material allows some light to pass through but scatters it, like wax paper.

Front

What is an opaque material?

Back

An opaque material does not allow light to pass through, like a wall.

Front

What is frequency in terms of light waves?

Back

Frequency refers to how many waves pass a point in one second; higher frequency means more waves.

Front

What is reflection?

Back

Reflection is when light bounces off a surface, like a mirror.

Front

What is refraction?

Back

Refraction is the bending of light as it passes from one medium to another, like air to water.

Front

What is the speed of light?

Back

The speed of light in a vacuum is approximately 299,792 kilometers per second.