Planck Distribution Function

#Physics

$\displaystyle {\left\langle{s}\right\rangle}=\frac{1}{e^{\hbar \omega \beta}-1}$

• Average number of photons in frequency mode $\displaystyle \omega$

$\displaystyle {\left\langle{N}\right\rangle}=\sum_{n}{\left\langle{s_{n}}\right\rangle}$