Ch. 4 Electromagnetic Waves

Front

What are electromagnetic waves with the highest frequencies called?

Back

Gamma rays.

Front

What is the range of electromagnetic waves placed in a certain order called?

Back

Electromagnetic spectrum.

Front

Which type of radio broadcast has a greater broadcast range?

Back

AM radio waves.

Front

What remains constant on AM broadcasts?

Back

The frequency.

Front

What is the primary characteristic of AM radio waves?

Back

The amplitude of the wave varies.

Front

What is the primary characteristic of FM radio waves?

Back

The frequency of the wave varies.

Front

What type of electromagnetic wave is used in microwave ovens?

Back

Microwaves.

Front

What is the speed of electromagnetic waves in a vacuum?

Back

Approximately 299,792 kilometers per second (the speed of light).

Front

What is the relationship between wavelength and frequency in electromagnetic waves?

Back

They are inversely related; as wavelength increases, frequency decreases.

Front

What part of the electromagnetic spectrum can humans see?

Back

Visible light.