Penn StateNASA

Blackbody Radiation

Thu, 03/20/2014 - 16:18 -- djn12

In the realm of physics, a blackbody is an idealized material that absorbs perfectly all EM radiation that it receives (nothing is reflected), and it also releases or emits EM radiation according to its temperature. Hotter objects emit more EM energy and the energy is concentrated at shorter wavelengths.

Earth gives off more long wave radiation at night timeThe energy released by any body is a function of its temperatureThe wavelength of radiation emitted is a function of distance above the EarthEnergy released by Earth changes markedly from day to day
Which of the following statements is correct?
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