Radar is abbreviation (short form) of RAdio Detecting And Ranging.
Radar is in use all around us, although it is normally invisible.
Three predominant uses for radar are:
1- Detect the presence of an object at distance.
2- Determine the speed of an object.
3- Map something.
Radar makes use of two techniques using radio wage: Ecoh and Doppler Shift.
Our ears hear echo and doppler shift every day.
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