Application of Bose Einstein statistics to photon gas | Statistical mechanics.
Автор: Learning Science
Загружено: 2021-06-17
Просмотров: 9802
Описание:
Under thermal equilibrium, the energy distribution of blackbody radiation can be determined by Bose Einstein statistics. The equilibrium radiation within the blackbody enclosure is treated as a collection of electromagnetic radiation i.e photons. Therefore, black body radiation may be regarded as a gas consisting of photons. These photons do not interact with each other, therefore the photon gas is an ideal gas. Bose and Einstein explained the energy distribution of blackbody radiation using the following assumptions:
1) The electromagnetic radiations carry energy in discrete quanta or bundles. Each quanta has energy hv and momentum hv/c. These quantas are called photons and are treated as indistinguishable particles. Therefore, blackbody radiation may be considered as a gas consisting of photons. These photons do not interact with each other, so the photon gas is an ideal gas.
2) These photons are called boson and obey B-E statistics.
3) The total energy of the photon gas remains conserved.
4) The photon number is not conserved.
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