## https://en.wikipedia.org/wiki/Cross_section_(physics)

dimensionality $\sigma \sim (cm)^2$

- [Point scatterers for classical waves](https://pure.uva.nl/ws/files/2839155/34565_154043y.pdf) 1998

resonant scattering at high frequencies $\sigma \sim \frac{1}{\omega^2}$

## Rayleigh scattering https://en.wikipedia.org/wiki/Rayleigh_scattering

$\sigma \sim \frac{1}{\omega^4}$

- https://en.wikipedia.org/wiki/Brillouin_scattering#Contrast_with_Rayleigh_scattering

## https://en.wikipedia.org/wiki/Raman_scattering