Actress | Producer | Soundtrack. Holly Hunter was born in Conyers, Georgia, to Opal Marguerite (Catledge), a homemaker, and Charles Edwin Hunter, a part-time sporting goods company representative and farmer with a 250 acre farm. She is the youngest of seven children.
radar definition. A method of finding the position and velocity of an object by bouncing a radio wave off it and analyzing the reflected wave. Radar is an acronym for radio detection and ranging. Note: Police use radar techniques to determine the speed of automobiles.
If you shout hello, the sound may bounce back at you from a large object. You then hear your own voice coming back. Your returning voice is called an echo. Radar and sonar are electronic devices that use the principle of an echo to detect and locate objects. Both radar and sonar locate objects from the echo of a signal that is bounced off the object. Radar uses radio waves, which are a type of electromagnetic energy. Sonar uses the echo principle by sending out sound waves underwater or through the human body to locate objects. Sound waves are a type of acoustic energy. Because of the different type of energy used in radar and sonar, each has its own applications.