lecture4 - Absorption and emission lines give information...

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‘Orbitals’ calculable with QM
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Interaction of Light with Matter Photons emitted or absorbed as electrons jump levels emission lines absorption lines Happens only at specific energies (frequencies) for a given substance
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Kirchoff’s Laws
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Examples of Spectra Emission line spectra of several elements (their 'fingerprints') Emission line spectrum of the Orion nebula (UV)
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Spectrum of an astrophysical object Intensity: how much light at a given frequency
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Unformatted text preview: Absorption and emission lines give information about the chemical composition! (atoms, ions, molecules) The Sun's spectrum: we can learn a tremendous amount about the chemical composition in the solar atmosphere by the characteristic spectral patterns Molecules also produce characteristic spectra Molecular bands (tightly bunched bands) More ways to absorb and release energy Lorentz-Cauchy distribution for natural line width...
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This note was uploaded on 02/26/2012 for the course PHYSICS 105 taught by Professor Kruse,m during the Spring '08 term at Duke.

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lecture4 - Absorption and emission lines give information...

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