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 rays, visible light, ultraviolet rays, x-rays, and gamma rays.

Front

What type of electromagnetic waves are used in radar technology?

Back

Microwaves are used in radar technology to detect objects and measure their distance and speed.

Front

Which electromagnetic waves are commonly used in microwave ovens and cell phone communications?

Back

Microwaves are commonly used in microwave ovens and cell phone communications.

Front

Which type of electromagnetic wave has the longest wavelength?

Back

Radio waves have the longest wavelength and the lowest frequency/energy.

Front

What are ultraviolet rays?

Back

Ultraviolet rays are a type of electromagnetic radiation that helps the body produce vitamin D.

Front

How do electromagnetic waves differ from other types of waves?

Back

Electromagnetic waves can travel through empty space, unlike mechanical waves that require a medium.

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).

Front

What is the visible spectrum?

Back

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

Front

What are gamma rays?

Back

Gamma rays are a type of electromagnetic radiation with the shortest wavelength and highest energy, often produced by radioactive materials.

Front

What are infrared rays used for?

Back

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