Electromagnetic Waves

By Michael Ackley

What kind of disturbance creates an EM wave?

Electromagnetic waves are made up of electric and magnetic components, and are created from a vibrating electric charge.

What are two ways that EM waves are different from mechanical waves?

One difference between EM and mechanical waves is that EM waves do not need a medium to travel through which mechanical waves do. Another way Em and mechanical waves differ is that EM waves contain a magnetic component.

Ranges of the EM spectrum for wavelength, frequency, and energy.

As you go down the EM spectrum, starting at gamma ray and ending at radio, the wavelengths get longer, but have less frequency and energy.
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