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Home Q & A Board Science-Related Homework Help Physics Astronomy
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barry barry
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11 years ago
How can Kirchhoff's Laws be used to deduce something about the nature of the light source?
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11 years ago
A continuous spectrum will peak at a certain color, giving us the temperature of the source.  But a continuum can be created by any dense hot body, be it solid, liquid, or gas, and we know nothing of its composition.  Emission lines reveal the component atoms in the thin hot gas, and Doppler shifts the motion of the gas atoms.  Likewise the absorption lines reveal composition and motion, but that the gas must be too cool to emit the bright line spectrum.
Would you know my name, if I saw you in heaven?

Eric Clapton
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barry Authorbarry
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11 years ago
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