Chapter 15: Electromagnetic Radiation

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Magnetic Resonance

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37 Terms

1

Magnetic Resonance

________ imaging technology uses radio waves as an alternative to X- ray imaging.

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2

Microwave Ovens

________ use electromagnetic waves to heat food.

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3

Energy

________ is transferred from one particle to the next as the wave travels through the matter.

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4

Transceiver

________: transmits one radio signal and receives another radio signal from a base unit.

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5

Visible Light

________: The electromagnetic waves that humans can detect with their eyes.

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6

Magnetic Fields

Because the electric and ________ vibrate at right angles to the direction the wave travels, an electromagnetic wave is a transverse wave.

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7

Radar

________ stands for RAdio Detecting And Ranging.

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8

Photon

________: a particle whose energy depends on the frequency of the waves.

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9

Satellite

The ________ relays the signal to a ground station, and the call is passed on to the telephone network.

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10

Sound Waves

When you speak into a telephone, a microphone converts ________ into an electrical signal.

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11

Carrier Wave

A(n) ________ broadcast by a radio station can be altered in one of two ways to transmit a signal: amplitude modulation (AM) or frequency modulation (FM)

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12

Microwaves

________: Radio waves with wavelengths of less than 30 cm.

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13

Ozone

________ is a molecule composed of three oxygen atoms.

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14

Electromagnetic Waves

________: made by vibrating electric charges and can travel through space where matter is not present.

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15

Global Positioning System

________ (GPS): a system of satellites, ground monitoring stations, and receivers that determine a persons or objects exact location at or above Earths surface.

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16

Cathode-Ray Tubes

________ produce the images you see on television.

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17

Enable Magnets

Fields ________ and charges to exert forces at a distance.

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18

Shortest Wavelengths

The electromagnetic waves with the ________ and highest frequencies are X rays and gamma rays.

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19

Communications Satellites

________ use solar panels to provide the electrical energy they need to communicate with receivers on Earth.

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20

Radio Wave

A(n) ________ does not produce compressions and rarefactions as it travels through air.

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21

Electrons

________ moving in a wire are surrounded by a magnetic field.

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22

GPS Satellites

________ are owned and operated by the United States Department of Defense, but the microwave signals they send out can be used by anyone.

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23

Net Flow of Electrons

An electric current, the ________ in one direction, is always surrounded by a magnetic field.

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24

Television Satellites

________ use microwaves rather than the longer- wavelength radio waves used for normal television broadcasts.

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25

Visible Light

________ is the range of electromagnetic waves that you can detect with your eyes.

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26

Cathode - Ray Tube

________: a sealed vacuum tube in which one or more beams of electrons are produced.

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27

Magnetic Field

A changing ________ creates a changing electric field.

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28

Electromagnetic Waves

made by vibrating electric charges and can travel through space where matter is not present

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29

Radiant Energy

The energy transferred by an electromagnetic wave

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30

Radio Waves

low-frequency electromagnetic waves with wavelengths longer than about 1 mm

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31

Microwaves

Radio waves with wavelengths of less than 30 cm

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32

Infrared Waves

a type of electromagnetic wave with wavelengths between about one millimeter and 750 billionths of a meter

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33

X Rays

have wavelengths between about 10 billionths of a meter and 10 trillionths of a meter

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34

Gamma Rays

Electromagnetic waves with wavelengths shorter than about 10 trillionths of a meter

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35

Carrier Wave

The specific frequency of the electromagnetic wave that a radio station is assigned

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36

Transceiver

transmits one radio signal and receives another radio signal from a base unit

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37

Global Positioning System (GPS)

a system of satellites, ground monitoring stations, and receivers that determine a persons or objects exact location at or above Earths surface

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