FIRST RADIATION CONSTANT
Definition
A <FIRST RADIATION CONSTANT> is a <NUMBER(math)> that has a <Property> that are the constants c1 and c2 in the expression for the spectral radiant exitance of a blackbody at the thermodynamic <TEMPERATURE> T, thus M_lambda(lambda) = c1.f(lambda, T) = c1.lambda^-5/(exp(c2.lambda^-1.T^-1)-1)