pyarts3.arts.physics.planck

physics.planck(frequency: object, temperature: object) → object

physics.planck(frequency: object, temperature: object) → object

Calculates the Planck function.

\[I =\frac{2h\nu^3}{c^2} \frac{1}{e^{\frac{h\nu}{kT}} - 1},\]

where \(\nu\) is the frequency and \(T\) is the temperature.

Parameters:

• frequency (Numeric or ndarray) – Frequency [Hz]

• temperature (Numeric or ndarray) – Temperature [K]

Returns:

B – Planck function [W/(m² Hz sr)]

Return type:

Numeric or ndarray