110 Bose–Einsteingases
- ModifiedBE statisticsdescribes theproperties ofassemblies ofmasslessbosons,
for which there is no conservation ofparticle number.
8 .Thisform ofstatistics gives an excellent understanding of‘black-bodyradiation’
asphotonsinthermalequilibrium. - A similar treatment of sound waves (as weakly-interacting phonons) enables us to
understandandcompute thethermalproperties ofcrystalline solids.