Correct Answer - Option 1 : detection of aircraft
The radar principle is used in the detection of aircraft.
Radar:
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Radar is an acronym for Radio Detection and Ranging.
- The term "radio" refers to the use of electromagnetic waves with wavelengths in the so-called radio wave portion of the spectrum, which covers a wide range from 104 km to 1 cm.
- It is basically an electromagnetic system used to detect the location and distance of an object from the point where the RADAR is placed.
- It works by radiating energy into space and monitoring the echo or reflected signal from the objects.
- It works on radio frequency in the range of about 3 kHz to 300 GHz.
- But most of the RADAR operates between 220 MHz to 35 GHz.
Radar systems have been used in military applications for
- Ground surveillance
- Missile control, fire control,
- Air traffic control (ATC),
- Moving target indication (MTI),
- Weapons location
- Vehicle search
