In the year 1926 , Fermi and Dirac used the Pauli's exclusion principle to modify the BE STATISTICS and successfully explained the behaviour of free electrons in metals . Thus , Fermi Dirac statistics came in to existence .
Following are the assumptions of FD statistics -
Following are the assumptions of FD statistics -
- The particles of the system are indistinguishable and identical .
- Available volume of phase space cell can not be less than h3 where h is Planck's constant
- A phase space cell can not contain more than one particle .
- The number of phase space cell is large as compared with the number of particles , such that occupation index is less than or equals to one .
- The particles of the system obey Pauli's exclusion principle
Mathematical explanation is also required at same place
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