1. The problem statement, all variables and given/known data Bλ(T) = β Bν(T) / λ2 v = frequency λ = wavelength find β , if Bλ(T) is in units Watt/m2/μm while Bν(T) is in units Jy (= 10−26 Watt/m2/Hz) 2. Relevant equations 3. The attempt at a solution I know that first of all Bλ(T) = Bν(T) * |dv/dλ| = Bv(T) * c / λ^2 so at least one part of Beta should be c Do i multiple Bv(T) Times 10^26 * 10^-6 to account for the different units? so that β = c * 10^20? Or is this wrong?