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

What type of electromagnetic wave is emitted by quasars with a frequency of 1.41 × 10^9 Hz?

Back

Microwaves.

Front

How does the energy of an electromagnetic wave change as its frequency increases?

Back

The energy of an electromagnetic wave increases as its frequency increases.

Front

Which electromagnetic wave has the lowest energy?

Back

Microwave.

Front

What is the relationship between wavelength and frequency?

Back

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

Front

True or False: As you move from radio waves to gamma rays in the electromagnetic spectrum, the wavelengths decrease in size.

Back

True.

Front

What are radio waves used for?

Back

Radio waves are used for communication, including television, radio, and cell phone signals.

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 300,000 km/s).

Front

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

Back

Visible light.

Front

What is the order of the electromagnetic spectrum from longest wavelength to shortest?

Back

Radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, gamma rays.