Explain the following features of Compton scattering of light by matter: (a) The increase in wavelength is

Question:

Explain the following features of Compton scattering of light by matter:
(a) The increase in wavelength ∆λ is independent of the nature of the scattering substance;
(b) The intensity of the displaced component of scattered light grows with the increasing angle of scattering and with the diminishing atomic number of the substance;
(c) The presence of a non-displaced component in the scattered radiation.