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Homework Help: Converting to nanometers

  1. Nov 4, 2008 #1
    1. The problem statement, all variables and given/known data

    i just need to convert 2.8*1014 into nano meters


    2. Relevant equations

    [tex]\lambda[/tex] = v / f



    3. The attempt at a solution

    [tex]\lambda[/tex] = v / f

    [tex]\lambda[/tex] = 2.0*108 / 700*10-9 (nanometers)

    [tex]\lambda[/tex] = 2.8*1014

    i am backwards on my conversion, i am horrible at it.

    is it:

    A - 2.80000000 nm

    or

    B - .00000028 nm

    it wants my answer to three sig fig's
     
  2. jcsd
  3. Nov 4, 2008 #2

    mgb_phys

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    Science Advisor
    Homework Helper

    I'm guessing it's a frequency of 2.8^14 hz the OP wants to convert into a wavelegnth.

    wavelength * frequency = speed.
    so wavelength = c/f = 3e8 m/s / 2.8E14 /s = 1.07e-6m = 1070 e-9m
     
  4. Nov 5, 2008 #3
    yes that got the first problem correct.

    thanks
     
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