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

#### theneedtoknow

1. Homework Statement

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. Homework 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?

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