Spectral Power Distribution of a Blackbody Radiator

The spectral power distribution of a blackbody radiator is a function of wavelength λ (in meters) and temperature T (in kelvin). This function is described by Planck's formula:

where:

You can use the CIE Spectral Display Calculator to see plots of the blackbody curve at any temperature.

Implementation Notes:

1. This equation is often used in a relative form, normalizing so that M_e is 100 or 1.0 at λ = 560 nm.