# Cross-section and types of scattering
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## https://en.wikipedia.org/wiki/Cross_section_(physics)
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dimensionality $\sigma \sim (cm)^2$
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- [Point scatterers for classical waves](https://pure.uva.nl/ws/files/2839155/34565_154043y.pdf) 1998
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resonant scattering at high frequencies $\sigma \sim \frac{1}{\omega^2}$
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## Rayleigh scattering https://en.wikipedia.org/wiki/Rayleigh_scattering
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$\sigma \sim \frac{1}{\omega^4}$
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# Parents
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* Spectroscopy of condensed matter⏎