Radar echo Microwaves scattered or reflected by distant rain or snow back to a receiver where they are displayed as bright spots on a cathode ray tube.
Because water molecules absorb microwaves and other radio wave frequencies, water in the atmosphere attenuates radar signals.
Far Infrared - the region of the electromagnetic spectrum with wavelengths greater than infrared but shorter than microwaves; radiation between about 4 microns and 0.1 millimeters ...
Radio Detection And Ranging. An electronic instrument used to detect precipitation by the ability of rain droplets (and other hydrometeors) to reflect microwaves (radio waves) back to a receiver.
Radial velocity ...
process by which radiated energy moves through space or material media; (2) energy propagated through space or through material media in the form of an advancing disturbance in electric and magnetic fields (e.g., visible light, x-rays, microwaves, ...
RADIO FREQUENCY - Electomagnetic waves below the frequencies of infrared and visible light. This includes microwaves and most radio waves. Also called RF.
In order of decreasing energy, the principal forms of radiation are gamma rays, X-rays, UV (ultraviolet radiation). visible light, infrared radiation, microwaves, and radio waves.
Surveying measurement of linear distances by use of tellurometer--a device that uses microwaves to measure distance.
Telephony Used to transmit sounds between widely removed points with or without connecting wires.
 See also: Weather, Temperature, Energy, Pressure, Water
  
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