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Astrophysics - luminosity and flux equations doing my nut in watch

    • Thread Starter

    Hi folks

    First off I have only just figured out that v is used as bloody frequency in loads of astrophysics equations. Pointless?

    I've got monochromatic flux as:

    Fv = dE / dt·dA·dv

    now I'm happy with this. But now the notes I'm looking at describes monochromatic luminosity as "the energy emitted by the source in unit time, per unit wavelength" but then gives the equation as:

    Lv = dE / dt·dv

    so surely it should be ""the energy emitted by the source in unit time, per unit frequency"

    BUT monochromatic means the energy at a given wavelength doesn't it, however there is no wavelength in the equation.

    My head is just all over the place at the moment, can anyone please clear it up?
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Updated: May 13, 2013
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