Who discovered the scattering of which Thomson scattering is just the low energy limit ?
Thomson scattering Thomson scattering is the elastic scattering of electromagnetic radiation by a free charged particle, as described by classical electromagnetism. It is just the low-energy limit of Compton scattering: the particle kinetic energy and photon frequency do not change as a result of the scattering. This limit is valid as long as the photon energy is much less than the mass energy of the particle: formula_1, or equivalently, if the wavelength of the light is much greater than the Compton wavelength of the particle.
Dawes' limit Dawes' limit is a formula to express the maximum resolving power of a microscope or telescope. It is so named after its discoverer, W. R. Dawes, although it is also credited to Lord Rayleigh.