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A microwave oven or simply microwave is an electric oven that heats and cooks food by exposing it to electromagnetic radiation in the microwave frequency range. [1] This induces polar molecules in the food to vibrate [2] and produce thermal energy in a process known as dielectric heating. Microwave ovens heat foods quickly and efficiently ...
A microwave oven passes microwave radiation at a frequency near 2.45 GHz (12 cm) through food, causing dielectric heating primarily by absorption of the energy in water. Microwave ovens became common kitchen appliances in Western countries in the late 1970s, following the development of less expensive cavity magnetrons. Water in the liquid ...
Percy Spencer. Percy LeBaron Spencer (July 19, 1894 – September 8, 1970) was an American physicist, electrical engineer and inventor who became known as the inventor of the microwave oven. [1]
Microwave transmission is the transmission of information by electromagnetic waves with wavelengths in the microwave frequency range of 300 MHz to 300 GHz (1 m - 1 mm wavelength) of the electromagnetic spectrum. Microwave signals are normally limited to the line of sight, so long-distance transmission using these signals requires a series of ...
The birth of modern computing was in the 1970s. The world's first general microprocessor, the Intel 4004, came out in November 1971. The C programming language was developed early in the decade and the Unix operating system was rewritten into it in 1973. With "large-scale integration" possible for integrated circuits (microchips) rudimentary ...
Moscow Signal. The Moscow Signal was a reported microwave transmission varying between 2.5 and 4 gigahertz, directed at the U.S. Embassy in Moscow from 1953 to 1976, resulting in an international incident. There were no significant health effects on embassy staff, although this conclusion has been disputed.
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1881; 143 years ago (1881) Tappan is a brand of appliances, named after company founder W. J. Tappan. [1][2] Tappan claimed several innovations: 1930s all- porcelain range available in various colors [2] 1955 the first compact (24") microwave oven [2] 1960s electric ignition for gas ranges [citation needed] 1965 single-unit conventional range ...
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