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Old 05-14-2004, 02:16 PM   #8 (permalink)
fckm
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Location: Ithaca, New York
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not quite. Photons don't lose energy when they interact with matter. A photon is a quantization of the electromagnetic field. When light interacts with matter, a photon is either absorbed, or it is not. A photon cannot lose some portion of energy to an atom, it must be either absorbed fully, or not at all. The energy of a photon is completely determined by it's frequency, so E=plank's constant*nu.

That said, it is possible for the atom to remit a photon of different energy/frequency after it absorbes a photon of one frequency.
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