Modified True/False
Indicate
whether the sentence or statement is true or false. If false, change the identified word or
phrase to make the sentence or statement true.
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1.
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Electromagnetic waves are classified as longitudinal waves.
_________________________
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2.
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Polarized light consists of waves that vibrate in one direction only.
_________________________
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3.
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Electromagnetic waves with the longest wavelengths have the highest
frequencies. _________________________
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4.
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The
tuner on a radio allows you to select a station based on the amplitude of the radio waves
transmitted from the radio station. _________________________
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5.
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Electromagnetic waves that have wavelengths slightly shorter than those of visible
light are called ultraviolet rays. _________________________
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6.
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Thermograms are produced by X-rays. _________________________
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7.
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In a
sodium vapor light, neon and argon gas are heated until they cause sodium to change from a
liquid into a gas. _________________________
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8.
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Each
radio and television station is assigned a basic broadcast frequency known as the carrier
frequency. _________________________
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9.
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Cellular telephones transmit and receive signals using high-frequency gamma
rays. _________________________
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10.
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Satellite telephone systems make long-distance telephone calls more easily
available and less costly. _________________________
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Essay
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11.
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Look
at the following group of terms and decide which term does not belong: star, candle
flame, moon, glowing light bulb filament. Give a reason for your
choice.
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12.
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Explain how light can be thought of as both a particle and a wave.
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13.
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Compare and contrast the properties of visible light, ultraviolet rays, and
X-rays.
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14.
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What
properties of gamma rays make them useful in medicine? Explain.
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15.
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How
is light produced in a fluorescent bulb? In an incandescent bulb?
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16.
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Which
type of radio broadcast has a greater broadcast range, AM or FM? Explain.
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17.
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Contrast the transmission of signals by a cellular telephone with the transmission of
signals by a cordless telephone.
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18.
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How
do television networks use communications satellites?
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