PlanetPhysics/Planck's Radiation Law

The spectral radiance of a black body per unit [[../CoIntersections/|solid]] angle is given by:

$I(\lambda ,T)=\frac{2h{c}^2}{{\lambda }^5}\frac{1}{e^{hc/\lambda kT}-1}$

It can also be given as a [[../Bijective/|function]] of frequency:

$I(\nu ,T)=\frac{2h{\nu }^3}{c^2}\frac{1}{e^{hc/\lambda kT}-1}$