A black body's spectral radiance as a function of temperature T and wavenumber ν is
(, ) = 2 h ^3 exp (h /) − 1
What is the radiance emitted by a black body at wavenumber [nu] cm^-1 and temperature [T] K? Planck's constant h is 6.63 x 10-34 m^2 kg s^-1, the speed of light c is 3 x 108 m s^-1, and Boltzmann's constant k is 1.38 x 10-23 m^2 kg s^-2 K^-1. Give your answer to two significant figures, and don’t forget the units.