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Old 11-24-2019, 06:13 PM   #9 (permalink)
freebeard
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Any matter that has a temperature higher than its surroundings emits radiation at various frequencies. The total amount of radiation and the distribution of the emitted wavelengths depend almost entirely on the temperature of the body and are not characteristics of the material itself. For an idealised black body that absorbs all radiation that falls onto it, this relationship between temperature and wavelength of maximum emission is completely precise. Many astronomical bodies, such as stars, can be considered to be almost perfect black bodies, so we can apply all the characteristics of a black body to them.
Black body radiation

I guess my question now is why elements exhibit the spikes. And whether the plasma is a body or an element. I need to care more.
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