Blackbody radiation

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Everything glows, depending on its temperature. Hotter things glow more in shorter wavelengths. Cooler things don't glow so much, especially in short wavelengths. Partly the radiation wavelength depends on what the material is, and partly it doesn't. The part that only depends on temperature, and not on composition, is called blackbody radiation.

Quantum wave[change | change source]


When it was realised that classical physics did not work for blackbody radiation, the German physicist Max Planck explained their relationship by saying that there are individual things (he did not try to guess what kind of things) that vibrate, each at its frequency. Each wave of each frequency has its special energy level. A single x-ray is very high photon energy and can go right through the human body.



E = n h f



Related pages[change | change source]