PLANK’S QUANTANUM THEORY:
This theory was put forward by “Max Plank” in 1900 in which he discovered the behaviour of energy emitting as radiations.
According to Plank’s Theory energy can not absorbed or emitted by atoms in any arbitrary quantify but absorbed and released in fixed quantify called “Quanta” which is a bundle of energy. The energy of each bundle is either equal to “hυ” or its integral multiple.
E = hυ
h = Plank’s constant = 6.625×10-34 JS
υ = frequency of radiation