Topic
Kramers–Heisenberg formula.
an equation for the cross section for scattering of a photon by an atomic electron
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About Kramers–Heisenberg formula
The Kramers–Heisenberg dispersion formula is an expression for the cross section for scattering of a photon by an atomic electron. It was derived before the advent of quantum mechanics by Hendrik Kramers and Werner Heisenberg in 1925, based on the correspondence principle applied to the classical dispersion formula for light. The quantum mechanical derivation was given by Paul Dirac in 1927.
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