Planck's Law

#Physics

Classical

$\displaystyle B(\nu)=\frac{2\pi}{c^{2}}k_{B}T \nu ^{2}$

• Classical prediction for the radiance $\displaystyle B$ of a blackbody
• As frequency increases and reaches ultraviolet light, the spectral

Quantum

$\displaystyle B(\nu,T)=\frac{2\pi}{c^{2}} \frac{h\nu ^{3}}{e^{h\nu \beta}-1}$

• Quantum version to the blackbody
• $\displaystyle \beta$ is the [coldness]