Electromagnetic Spectrum 2024

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is a continuous range of frequencies for electromagnetic radiation, including radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma rays.

Front

Why can light travel through a vacuum?

Back

Light can travel through a vacuum because it does not require a medium to propagate, unlike sound which needs a medium such as air or water.

Front

What type of electromagnetic waves help the body produce vitamin D?

Back

Ultraviolet rays are the type of electromagnetic waves that help the body produce vitamin D.

Front

Which has a higher frequency: visible light or ultraviolet rays?

Back

Ultraviolet rays have a higher frequency than visible light.

Front

What type of waves from the sun can cause sunburn?

Back

Ultraviolet waves from the sun can cause sunburn.

Front

What is the speed of light in a vacuum?

Back

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

Front

What are radio waves used for?

Back

Radio waves are used for communication, including broadcasting radio and television signals, as well as for mobile phones and wireless networks.

Front

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

Back

The relationship is inversely proportional; as frequency increases, wavelength decreases, and vice versa.

Front

What are microwaves commonly used for?

Back

Microwaves are commonly used for cooking food and in communication technologies, such as satellite transmissions.

Front

What is the visible spectrum?

Back

The visible spectrum is the portion of the electromagnetic spectrum that can be seen by the human eye, typically ranging from wavelengths of about 400 to 700 nanometers.