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Convert between Intensity as f'n of wavelength and intencity as f'n of frequency

  1. Nov 23, 2009 #1
    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?
  2. jcsd
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