1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Half wave equation is this right?

  1. Nov 19, 2008 #1
    Hey, I've been asked to find the minimum thickness for a slab of crystalline sapphire. The equation for the half wave plate is :

    d(ne-no) = (m+1/2)*lambda

    I found the minimum by using the fact that m=0

    It then asks what the other wavelengths are which will allow the plate to act as a Half wave plate.
    Do I just plug integers in starting from 1 or is that wrong?
    Thanks :)
  2. jcsd
  3. Nov 20, 2008 #2
    Yes, for shorter wavelengths, you can get retardations of 3/2 waves, 5/2 waves etc. - which are equivalent to half wave shifts.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Half wave equation is this right?
  1. Half wave antenna (Replies: 1)

  2. Equation of a Wave (Replies: 4)

  3. Wave equation (Replies: 1)