________ imaging technology uses radio waves as an alternative to X- ray imaging.
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Microwave Ovens
________ use electromagnetic waves to heat food.
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Energy
________ is transferred from one particle to the next as the wave travels through the matter.
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Transceiver
________: transmits one radio signal and receives another radio signal from a base unit.
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Visible Light
________: The electromagnetic waves that humans can detect with their eyes.
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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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Radar
________ stands for RAdio Detecting And Ranging.
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Photon
________: a particle whose energy depends on the frequency of the waves.
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Satellite
The ________ relays the signal to a ground station, and the call is passed on to the telephone network.
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Sound Waves
When you speak into a telephone, a microphone converts ________ into an electrical signal.
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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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Microwaves
________: Radio waves with wavelengths of less than 30 cm.
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Ozone
________ is a molecule composed of three oxygen atoms.
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Electromagnetic Waves
________: made by vibrating electric charges and can travel through space where matter is not present.
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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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Cathode-Ray Tubes
________ produce the images you see on television.
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Enable Magnets
Fields ________ and charges to exert forces at a distance.
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Shortest Wavelengths
The electromagnetic waves with the ________ and highest frequencies are X rays and gamma rays.
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Communications Satellites
________ use solar panels to provide the electrical energy they need to communicate with receivers on Earth.
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Radio Wave
A(n) ________ does not produce compressions and rarefactions as it travels through air.
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Electrons
________ moving in a wire are surrounded by a magnetic field.
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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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Net Flow of Electrons
An electric current, the ________ in one direction, is always surrounded by a magnetic field.
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Television Satellites
________ use microwaves rather than the longer- wavelength radio waves used for normal television broadcasts.
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Visible Light
________ is the range of electromagnetic waves that you can detect with your eyes.
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Cathode - Ray Tube
________: a sealed vacuum tube in which one or more beams of electrons are produced.
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Magnetic Field
A changing ________ creates a changing electric field.
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Electromagnetic Waves
made by vibrating electric charges and can travel through space where matter is not present
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Radiant Energy
The energy transferred by an electromagnetic wave
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Radio Waves
low-frequency electromagnetic waves with wavelengths longer than about 1 mm
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Microwaves
Radio waves with wavelengths of less than 30 cm
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Infrared Waves
a type of electromagnetic wave with wavelengths between about one millimeter and 750 billionths of a meter
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X Rays
have wavelengths between about 10 billionths of a meter and 10 trillionths of a meter
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Gamma Rays
Electromagnetic waves with wavelengths shorter than about 10 trillionths of a meter
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Carrier Wave
The specific frequency of the electromagnetic wave that a radio station is assigned
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Transceiver
transmits one radio signal and receives another radio signal from a base unit
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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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Flashcard (21)