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What Is Radar
Beginning of paper
The word "radar" was invented by scientists of the United States Navy
during World War II. The word comes from the first letters in the term
"radio detection and ranging.""Detection," as used here, means finding an
object or target by sending out a radio signal that will bounce back off
the target as a radio echo. "Ranging" means measuring the d ....
Middle of paper
....ger sets used to study
distant planets may oupy a building many stories high. The size of a radar
set depends on the job it is expected to do. But all radar sets, regardless
of their size, use the principle of the echo.
How Radar Works
Radar sets produce radio signals. They radiate(send out) these
signals into space with a transmitter.
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| Word count: 2203 |
Page count: 9 |
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