How is the property of reflection of electromagnetic waves used in practice? What is radar and how does it work?

The property of reflection of electromagnetic waves is used in practice to determine the location of ships and aircraft, rockets and spaceships. A device that sends radio waves in a given direction and receives a reflected signal is called radars. Using a radar, the distance 1 to the aircraft is determined by measuring the time interval t between the moments of the departure of the electromagnetic wave and the return of the reflected wave The sought distance is 1 = s * t / 2

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