- Books Name
- Kaysons Academy Chemistry Book
- Publication
- Kaysons Publication
- Course
- JEE
- Subject
- Chemistry
Black body: An ideal body, which emits and absorbs all frequencies, is called a black body. The radiation emitted by such a body is called black body radiation.
Planck’s Quantum Theory
Planck said that atoms and molecules could emit (or absorb) energy only in discrete quantities and not in a continuous manner, a belief popular at that time.
Planck gave the name quantum to the smallest quantity of energy that can be emitted or absorbed in the form of electromagnetic radiation.
E µ n Þ E = hn Þ
The proportionality constant, ’h’ is known as Planck’s constant and has the value 6.626 10-34 Js.