Electromagnetic Spectrum

Front

What is the electromagnetic spectrum?

Back

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

Front

How much of the electromagnetic spectrum is made up of visible light?

Back

Only a small portion.

Front

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

Back

Shorter waves have higher energy, while longer waves have lower energy.

Front

What are radio waves used for?

Back

Radio waves are used for communication, such as in cellphones and remote controls.

Front

Which type of electromagnetic radiation has frequencies higher than ultraviolet rays?

Back

X-rays.

Front

Which type of electromagnetic radiation has the shortest wavelength and highest energy?

Back

Gamma rays.

Front

What is visible light?

Back

Visible light is the portion of the electromagnetic spectrum that can be seen by the human eye.

Front

What are infrared rays?

Back

Infrared rays are electromagnetic waves with longer wavelengths than visible light, often associated with heat.

Front

What are ultraviolet rays?

Back

Ultraviolet rays are electromagnetic waves with shorter wavelengths than visible light, known for their ability to cause sunburn.

Front

What is the speed of electromagnetic waves in a vacuum?

Back

The speed of electromagnetic waves in a vacuum is approximately 299,792 kilometers per second (or about 186,282 miles per second).