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Homework Help: Ummm, what do these equations do

  1. Jul 29, 2005 #1
    hey, im look over some equations given to me by my instructor, and im reading the book and i cannot find what they do

    k= 2(pi) / wavelength...................what is k

    and theta_p = tan^-1 (n2/n1) what is theta_p

    and dx/L = m(wavelength) what is d and x what does this find.....

    thanks in advanced,,,,, great website
    Last edited: Jul 29, 2005
  2. jcsd
  3. Jul 29, 2005 #2
  4. Jul 29, 2005 #3


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    'k' is called the wave number i think. if you freeze a wave in time, k is equal to how much the phase changes per meter. you can tell by the units. 2pi is in radians and wavelength is in meters so k = radians/meter
  5. Jul 29, 2005 #4


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    Gold Member

    First one is the wave number.
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