# Formula Compton Scattering Wavelength difference    Compton wavelength    Scattering angle

## Wavelength difference

Unit
Wavelength difference is the difference between the wavelength of the photon before the collision and the wavelength of the photon after the collision.

## Compton wavelength

Unit
Compton wavelength characterizes the collision particle. For example, an electron has a Compton wavelength of $$2.426 \cdot 10^{-12} \mathrm{m}$$.

## Scattering angle

Unit
Scattering angle is the enclosed angle after the collision, between the momentum of the particle (or the momentum of the photon) and the horizontal x-axis.