<Dd> P r = exp ⁡ (− β E (r)) Z (β). (\ displaystyle P_ (r) = (\ frac (\ exp \ left (- \ beta E \ left (r \ right) \ right)) (Z \ left (\ beta \ right))).) </Dd> <Dl> <Dd> β = d e f 1 k B T . (\ displaystyle \ beta \ (\ stackrel (\ mathrm (def)) (=)) \ (\ frac (1) (k_ (\ mathrm (B)) T)).) </Dd> </Dl> <Dd> β = d e f 1 k B T . (\ displaystyle \ beta \ (\ stackrel (\ mathrm (def)) (=)) \ (\ frac (1) (k_ (\ mathrm (B)) T)).) </Dd> <P> The denominator Z (β), is the partition function of a single mode and makes P properly normalized: </P>

What is planck's law of blackbody radiation