Question

what is boseeinstein distribution law

Answer 1

The Bose–Einstein distribution, which applies only to a quantum system of non-interacting bosons, is easily derived from the grand canonical ensemble. In this ensemble, the system is able to exchange energy and exchange particles with a reservoir (temperature T and chemical potential µ fixed by the reservoir).

f(E)=. 1
________
E/kt

Answer 2

it describes the statistical behaviour of integer spin particles.