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Q.

Radar is an object-detection system that uses radio waves to:

 A.

locate geostationary satellites

 B.

determine the range, altitude, direction, or speed of objects

 C.

receive a signals in a radio receiver

 D.

locate submerged submarines

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Solution:
Option(B) is correct

Radar is an object-detection system that uses radio waves to determine the range, altitude, direction, or speed of objects.

It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain.

The radar dish transmits pulses of radio waves or microwaves that bounce off any object in their path. The object returns a tiny part of the wave's energy to a dish or antenna that is usually located at the same site as the transmitter.


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