Blackbody

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A black body is a theoretical object which absorbs all light which strikes it and emits different wavelengths of light depending on the temperature to which it is heated. The color temperatures of 5000 degrees K, 6500 degrees K, etc all refer to the color temperature of a black body heated to that temperature. This is called Blackbody radiation. Kelvin degrees are similar to degrees Celsius but start 273 degrees lower at absolute zero (0 degrees Celsius (ie:"freezing") - is 273 degrees Kelvin.)

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