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Maxwell's Rainbow Problem frequency/wavelength

  1. Aug 15, 2011 #1
    1. The problem statement, all variables and given/known data
    A certain helium-neon laser emits red light in a narrow band of wavelengths centered at 632.8nm and with a wavelength width if .01nm. What is corresponding frequency width for the emission?

    2. Relevant equations
    f=c/[itex]\lambda[/itex] ?

    3. The attempt at a solution
    I tried using the above with both numbers given. This is supposed to be an easy problem, but i think theres something im missing here... Answer is 7.49GHz?
  2. jcsd
  3. Aug 15, 2011 #2
    are you supposed to use both numbers given.. this has to be easier than im thinking
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