Low energy photon - electron collision


by Question Man
Tags: collision, electron, energy, photon
Question Man
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#1
Jul21-11, 05:53 PM
P: 9
Suppose a photon collides with an electron, but does not have enough energy to dislodge the electron or knock the electron into it's next energy level. What happens? Is the effect observed?
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CJames
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#2
Jul22-11, 01:39 AM
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P: 355
Nothing happens. The probability that an electron exists between energy levels is zero, so the probability that it will absorb that level of energy is zero.
Dickfore
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#3
Jul22-11, 02:01 AM
P: 3,015
The photon will scatter off from its initial direction, transferring a little momentum and kinetic energy to the atom as a whole and losing a little bit of energy, thus becoming redshifted. It is like the Compton scattering, only that instead of the mass of a free electron, you should use the mass of the atom.

Waterfox
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#4
Jul22-11, 03:38 AM
P: 33

Low energy photon - electron collision


I believe this is what happens in transparent objects


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