This is an audio version of the Wikipedia Article: 00:00:27 Astrophysics
00:02:16 Medical science
00:02:42 See also
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SUMMARY
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Photon diffusion is a situation where photons travel through a material without being absorbed, but rather undergoing repeated scattering events which change the direction of their path. The path of any given photon is then effectively a random walk. A large ensemble of such photons can be said to exhibit diffusion in the material, and can be described with a diffusion equation.
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