Electromagnetic Waves and Spectrum Quiz

  All of the following are examples of electromagnetic waves except

• sound waves

• microwaves

• gamma rays

• infrared light

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An electromagnetic wave begins when a(n)

• atom loses an electron.

• magnet is connected to a battery.

• charged particle vibrates.

• electron is magnetized.

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Which of the following waves does not require a medium?

• ocean waves

• earthquake waves

• sound waves

• radio waves

Most of the electromagnetic radiation on Earth comes from

• the sun.

• radio towers.

• X ray machines.

• microwave ovens.

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How long does it take electromagnetic radiation to reach Earth from the sun?

•   1 second

• 7.5 seconds

• 8 minutes

• 93 minutes

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What happens to light when it passes from water to air?

• Its speed decreases.

• Its frequency increases.

• Its wavelength decreases.

• none of the above

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If the frequency of an electromagnetic wave is 6.0 × 10⁸ hertz, what is its wavelength?

• 0.5 m

• 1.0 m

• 1.5 m

• 2.0 m

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Electromagnetic waves with the lowest frequencies may have wavelengths as long as

• many kilometers.

• a few meters.

• a couple of centimeters.

• a fraction of a millimeter.

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Which statement about electromagnetic waves is true?

• An electromagnetic wave with a shorter wavelength has a lower frequency.

• All electromagnetic waves travel at the same speed across space.

• All electromagnetic waves are harmful.

• none of the above

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Which electromagnetic waves are used for cell phone signals?

• Xrays

• microwaves

• gamma rays

• none of the above

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