Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Working with Wedge Fringes

  1. Mar 13, 2006 #1
    For a solid wedge of material of length L and maximum width D (ie, a triangle) how would one obtain an equation for /\x, the distance between dark fringes?

    For wedge fringes, how come the fringe at the narrow end is always dark?
  2. jcsd
  3. Mar 13, 2006 #2

    Doc Al

    User Avatar

    Staff: Mentor

    You need to consider two factors that determine the phase difference--and thus the interference--between the reflections at each boundary:

    What is the phase change upon reflection?

    What distance does the light travel in passing (twice) through the wedge?​
    Read up with these factors in mind.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook