Radar Is Developed.

“Radar” is an acronym for “radio detection and ranging.” The principle of radar involves the transmission of high-frequency pulses of electromagnetic energy through a directional antenna. The pulses are reflected by objects that intercept them. Radar receivers pick up the reflections, process them electronically, and convert them into dots of light (blips) on the face of a fluorescent screen that forms part of a cathode-ray tube. In this way, the receivers determine with instant precision the direction, distance, velocity, altitude, and even form of the targeted object, such as an airplane, ship, submarine, iceberg, body in space, thunderstorm, or landmass.