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Physics wave question

  1. May 30, 2009 #1
    1. The problem statement, all variables and given/known data
    Yellow-green light has a frequency of 5.50 x 10^14 Hz. how many wavelengths of this light can fit into a space 0.500 mm wide?


    2. Relevant equations

    not sure ..
    xn/L = n(lambda)/d
    ??

    3. The attempt at a solution
    ????
     
  2. jcsd
  3. May 30, 2009 #2

    cepheid

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    The logically prior question to ask would seem to be, how big is ONE wavelength? You are given a frequency. Do you know what the relationship is between frequency and wavelength?
     
  4. May 30, 2009 #3
    f = c/wavelength
    so wavelength = c/f
    = (3.00 x 10^8 m/s)/(5.50 x 10^14 Hz)
    = 5.45 x 10^-7 m
    ?
     
  5. May 30, 2009 #4

    cepheid

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    Okay, so how many of those wavelengths fit into half a millimetre?

    And why the question marks? If you don't understand what are you are doing conceptually and are just manipulating equations, then I would recommend asking for clarification. This is not just an exercise in math.
     
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