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!

Please help with optics question

  1. Dec 4, 2004 #1
    Imagine that you have an opaque screen with three horizontal very narrow parallel slits in it. The second is a center-to-center distance a beneath the first, and the third is a distance 5a/2 beneath the first. (a)Write a complex exponential expression in terms of δ for the amplitude of the electric field at some point P at an elevation θ on a distant screen where δ=ka sinθ. Prove that I(θ) = I(0)/3 + 2I(0)/9 (cos δ + cos 3δ/2 + cos 5δ/2)
    Verify that at θ=0, I(θ)=I(0)

    I think i got the first part (a) right for the exponential expression.
    E=Eo Re[e^i(α-wt) (1+e^-iδ +e^i3δ/2)]

    But my problem is that i don't know how to prove this Intensity equation.

    So any help would be greatly appreciated... :frown:
     
    Last edited: Dec 5, 2004
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted



Similar Discussions: Please help with optics question
  1. Problem help on optics (Replies: 0)

  2. Can you please help (Replies: 0)

Loading...