v 3.21

ε_{λ T} = \frac{2 π h c^{2}}{λ^{5}} (\frac{1}{\exp (\frac{h c}{λ k_{B} T}) - 1})

${\varepsilon_{\lambda T} = \frac{2 \pi h c^2}{\lambda^5} \left( \frac{1}{\exp(\frac{hc}{\lambda k_B T})- 1} \right)}$

Error