Historically, results observed from the studies of interactions of radiations with matter have provided immense information regarding the structure of atoms and molecules.
Neils Bohr utilised these results to improve upon the model proposed by Rutherford. Two developments played a major role in the formulation of Bohr’s model of atom. These were:
(i) Dual character of the electromagnetic radiation which means that radiations possess both wave like and particle like properties, and
(ii) Experimental results regarding atomic spectra.
First, we will discuss about the duel nature of electromagnetic radiations.