Wien radiation law

[2.13.5] An expression representing approximately the spectral radiance of a blackbody as a function of its wavelength and temperature. It is commonly expressed by the formula:

L_{lambda }=dI_{lambda}/dA' = c_{1L}lambda ^{-5}e^{-(c_{2}/lambda T)}

This formula is accurate to 1% or better for values of λT less than 3,000 micrometer-kelvins. « Back to Definitions Index