...
According to the quantum electron particle model this observation is not correct. We believe electrons in orbit shall absorba precise quantum of energy from EM-wave and re-radiate by precise amount by processes described by us, selective absorption and emission. We shall ignore quantum particle description for the time being. Contrary to see distribution, Compton discovered that at a given angle of approach only one frequency of radiation is observed in scattered spectrum. Compton explained this observation by stating that the EM waves were behaving like photon particles having energy hf and momentum hf/c. ating in a straight line. However, the theory had difficulties in other matters, and was soon overshadowed by Isaac Newton'ss corpuscular theory of light. That is, Newton proposed that light consisted of small panation.
...