The Nature of Electromagnetic Waves

The lowest point on this wave is called a

• crest.

• trough.

• compression.

• rarefaction.

Which wave in the diagram has the greatest frequency?

• 1

• 2

• 3

• 4

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Electormagnetic radiation travels through a vacuum at a speed of 

• 186,000 m/s.

• 125 m/s

• 3.00 x 10⁸ m/s

• It depends on the wavelength

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In what way does a transverse way move?

• parallel to the direction of the wave

• tangentially to the direction of the wave

• at an 180 degree angle

• perpendicular to the direction of the wave

What types of waves can travel through empty space AND mediums? (a)  

• Longitudinal

• Mechanical

• Electromagnetic

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Which type of electromagnetic wave is most harmful to human skin?

• Infrared radiation

• Ultraviolet light

• Visible light

• Radio waves

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Examples of electromagnetic wave are (choose all that apply)

• microwaves.

• gamma waves.

• ocean waves.

• radio waves.

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Which wave in the diagram has the greatest wavelength?

• 1

• 2

• 3

• 4

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A wavelength is the distance between which 2 points?

• B and G

• A and C

• C and F

• A and H

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Light travels at a speed of

• 186,000 m/s.

• 125 m/s

• 3.00 x 10⁸ m/s

• It depends on the wavelength

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