Front

What device produces light by running an electric current through a gas?

Back

A neon sign.

Front

Why does the light we see from stars take thousands of years to reach us?

Back

Because the stars are very far away.

Front

How does a light bulb work?

Back

An electric current is passed through a filament.

Front

Why does refraction occur?

Back

Light travels through different materials at different speeds.

Front

Light can behave as both a ______ and a _______.

Back

Wave; particle.

Front

What is the definition of refraction?

Back

The bending of light as it passes from one medium to another.

Front

What is an incandescent light bulb?

Back

A bulb that produces light by heating a filament until it glows.

Front

What is the speed of light in a vacuum?

Back

Approximately 299,792 kilometers per second.

Front

What is a prism used for?

Back

To separate white light into its component colors.

Front

What is the difference between reflection and refraction?

Back

Reflection is the bouncing back of light, while refraction is the bending of light.