Electromagnetic Spectrum

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, which includes radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma rays.

Front

Which electromagnetic waves have the highest frequencies?

Back

Gamma rays have the highest frequencies in the electromagnetic spectrum.

Front

What are microwaves used for?

Back

Microwaves are used in ovens for cooking food and in cell phone communications.

Front

What are electromagnetic waves?

Back

Electromagnetic waves are electric and magnetic fields (energy) that travel through empty space very quickly.

Front

How do electromagnetic waves differ from sound waves?

Back

Electromagnetic waves can travel through empty space, while sound waves require a medium (like air or water) to travel.

Front

What happens to the frequency of a wave as its wavelength increases?

Back

As the wavelength increases, the frequency decreases.

Front

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

Back

A wave with a large wavelength will have a low frequency and low energy.

Front

What type of electromagnetic waves can be seen by the human eye?

Back

Visible light is the type of electromagnetic waves that can be seen by the human eye.

Front

What are infrared rays used for?

Back

Infrared rays are used in remote controls, thermal imaging, and heating applications.

Front

What is the speed of electromagnetic waves in a vacuum?

Back

Electromagnetic waves travel at the speed of light, which is approximately 299,792 kilometers per second (186,282 miles per second) in a vacuum.