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Homework Help: Scattered light intensity

  1. Oct 23, 2016 #1
    1. The problem statement, all variables and given/known data
    Light is scattered in cuvette by Reyleigh scattering, and is measured by monochromator.
    Light intesity is given by I(ν)=I0ν1/2 relationship

    What is scattered light intensity at λ = 400nm if at λ = 800nm is I800?

    2. Relevant equations

    Scattered light intensity is proportional to I = 1/λ4

    and ν = c/λ --> I(λ) = I0(c/λ)1/2

    3. The attempt at a solution
    That's about it I can think of about this problem, any hints would be appreciated! ;]
  2. jcsd
  3. Oct 23, 2016 #2


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    2017 Award

    Staff: Mentor

    Your scattered light intensity is the product of the initial light intensity (which you transformed already) and the fraction that gets scattered (where you have the relation).

    It is a bit unclear if intensity is meant "per interval of ν" or "per interval of λ". If the intensity formula and the answer use different conventions you would have to transform that.
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