# Optionals IAS Mains Physics: Questions 1 of 307

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Appeared in Year: *2011 (IFS)*

### Write in Short

Short Answer▾Write down the expression for the Bose – Einstein distribution function and explain the meaning of the symbols used. (Paper-I) (Section - B)

## Explanation

The Bose – Einstein distribution function is given as,

Where,

The probability that a particle will have energy

Energy of state

The degeneracy

chemical potential (particle number) ,

Temperature of equilibrium

Boltzmann constant