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radar
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Learn how a radar works
principle of radar operation pulse waveform transmitted by radar parts of a radar system radar antennas ASR-9 airport surveillance radar AN/APG-66 radar in an F-16 fighter aircraft refraction of HF radar radiation by the ionosphere hook echo Waveguide
For Students
Air traffic controllers aboard the USS Essex monitoring radar screens, 2003.
radar summary
Quizzes
Yellow transportation sign with ASAP (as soon as possible) on violet color sky background. (acronyms)
Figure Out the Acronyms ASAP Vocabulary Quiz
Armed Forces Radio Services broadcaster Jack Brown interviews Humphrey Bogart and Lauren Bacall for broadcast to troops overseas during World War II.
Communications Firsts Quiz
Discover
Thumbnail for flags that look alike quiz Russia, Slovenia, Iceland, Norway
Flags That Look Alike
John F. Kennedy as a boy with his family
What Did We Call America’s Elite Before the “1 Percent”?
Rural Irish landscape, Sligo, Ireland.
Why Is Ireland Two Countries?
A human Inuit skull in a stone chambered cairn in Ilulissat in Greenland. These ancient graves are pre christian and are at least 2000
14 Tough Questions Answered
earthquake. Heavily damaged school in the town of Yingxiu after a major earthquake struck China's Sichuan Province on May 12, 2008.
The 6 Deadliest Earthquakes Since 1950
The Cheshire Cat is a fictional cat from Lewis Carroll's Alice's Adventures in Wonderland. (Alice in Wonderland)
11 Banned Books Through Time
Super Typhoon Noru over the western tropical Pacific Ocean as observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA Aqua satellite July 31 2017
What Is the Difference Between a Typhoon and a Super Typhoon?

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Videos

Learn how a radar works
A brief explanation of radar.
Video: © MinutePhysics (A Britannica Publishing Partner)

Images

principle of radar operation
The transmitted pulse has already passed the target, which has reflected a portion...
Encyclopædia Britannica, Inc.
pulse waveform transmitted by radar
A typical pulse waveform transmitted by radar.
Encyclopædia Britannica, Inc.
parts of a radar system
Basic parts of a radar system.
Encyclopædia Britannica, Inc.
radar antennas
(A) A parabolic reflector antenna in which the energy radiated from the focus is...
Encyclopædia Britannica, Inc.
ASR-9 airport surveillance radar
Reflector antenna for the ASR-9 airport surveillance radar, with an air-traffic-control...
Courtesy of Westinghouse Electric Corporation
AN/APG-66 radar in an F-16 fighter aircraft
The mechanically scanned planar phased-array antenna with radiating horizontal slots...
Courtesy of Westinghouse Electric Corporation
refraction of HF radar radiation by the ionosphere
Refraction of HF radar radiation by the ionosphere.
Encyclopædia Britannica, Inc.
hook echo
Hook echo of a tornado in Champaign, Ill., photographed on a radar scope on April...
Courtesy of the Illinois State Water Survey, Champaign, Illinois; photograph, Donald W. Staggs
Waveguide
Flexible waveguide from a radar apparatus.
Muraer
Air traffic controllers aboard the USS Essex monitoring radar screens, 2003.
U.S. Navy
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