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Physics
Atomic and Condensed Matter
Distinguishing Blackbody and Atomic Spectra of the Sun
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[QUOTE="Charles Link, post: 5459606, member: 583509"] The surface temperature of the sun is approximately 6000 K. The spectrum would be a blackbody except that cooler gaseous elements just outside the sun will sometimes be found in the ground state and lower excited states. These are able to then absorb energy from the blackbody at wavelengths corresponding to atomic transitions more so than the energy that they re-radiate. The result is a spectrum of approximately a T= 6000 K blackbody except for narrow atomic absorption lines where the energy is somewhat less than the blackbody curve intensity. For an earth-based system, you need to ensure that the observed absorption lines (deviation from a smooth blackbody curve )didn't occur from elements and molecules in the Earth's atmosphere. [/QUOTE]
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Physics
Atomic and Condensed Matter
Distinguishing Blackbody and Atomic Spectra of the Sun
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