Boson paricles v Boson Gas

[failexam]

1. The problem statement, all variables and given/known data

I want to apply the Bose Einstein distribution, firstly to a photon gas and then, to a massive boson.

2. Relevant equations

Bose Einstein distribution

3. The attempt at a solution

How do I begin?

[zhermes]

Start here: http://en.wikipedia.org/wiki/Bose%E2%80%93Einstein_statistics