Ch. 21 Electromagnetic Energy Quiz

Which of the following statements is true about both electromagnetic waves and sound waves?

• Neither needs a physical medium to travel through.

• Both are produced by vibrating charged particles.

• Both transfer energy through disruptions.

• Both travel at the speed of light.

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High energy waves have ___ frequencies and ___ wavelengths.

• high; long

• low; long

• low; short

• high; short

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(True or False) Electromagnetic waves travel slower through matter than through a vacuum.

• True

• False

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(True or False) The intensity of an electromagnetic wave is inversely proportional to the square of the distance from its source.

• True

• False

A particle of electromagnetic energy is called a(n) __________.

• photon

• electron

• neutron

• proton

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Which kind of electromagnetic wave is emitted during radioactive decay?

• gamma rays

• microwaves

• ultraviolet waves

• x-rays

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Which kind of electromagnetic waves are most useful for medical imagery and transportation security?

• gamma rays

• infrared waves

• radio waves

• x-rays

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The AM and FM bands broadcast using .

• infrared waves

• radio waves
• ultraviolet waves

• x-rays

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Which of the following types of electromagnetic energy have higher frequencies than infrared waves? Choose all that apply.

• microwaves

• ultraviolet waves

• visible light

• x-rays

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5. Which two electromagnetic waves are used for cooking and heating food?

• Microwaves and Infrared waves

• Ultraviolet and X-rays

• Gamma rays and Radio waves

• Visible light and Ultraviolet

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