F = 2 h c^{2} ^{-5} / (exp(hc/kT) - 1).

or, combining the constants:

F = c_{1} ^{-5} / exp(c_{2} /T) - 1),

where c_{1} = 2 hc^{2} = 3.7419 × 10^{-5} erg cm^{2} s^{-1} [ in cm]

and c_{2} = hc/k = 1.4288 cm °K.

In these equations, the physical constants used are:

= 3.14159

c = 2.9979 × 10^{10} cm/s (the speed of light)

h = 6.6262 × 10^{-27} erg s (Planck constant)

k = 1.3806 × 10^{-16} erg deg^{-1} (Boltzmann constant)

= 5.67 × 10^{-5}
erg cm^{-2} s^{-1} K^{-4}

The variables are:

T the temperature in degrees Kelvin (Centigrade degrees above absolute zero)

the wavelength in cm.

Introduction to Blackbody radiation

Wien Distribution

Rayleigh-Jeans Distribution

Wien Displacement Law

Stefan-Boltzmann Law

Constants

This VRML + HTML package on Blackbody emission was constructed by Karen M. Strom. Contact your local instructor for help if it is used as part of your class.