Can this be explained using statistical mechanics only?

1. Aug 6, 2015

Christian Grey

I want to find photon energy distribution, let's say in a closed cube box,there are 100 photons(suppose 1 photon contains 1 Joule),and there's a mirror on left side and then there's a glass in between and the right side is completely black. I want to find photon energy distribution(like how much energy is at specific point inside the box) inside this box? And do we need quantum mechanics along with statistical mechanics to explain photon energy distribution,like to find how many photons will be reflected or refracted due to mirror and glass or this can be explained using statistical mechanics only?

2. Aug 6, 2015

The_Duck

In thermal equilibrium, the distribution of photon energies will be given by Planck's law

To derive the Planck distribution you need quantum statistical mechanics.