1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Newton's Rings

  1. Oct 4, 2008 #1
    1. Show that for t<<R, the radius r of a fringe is related to r= (2TR)^1/2

    I'm not sure what the relevant equations are, that would be the problem. A gentle shove in the right direction would be appreciated, I've been looking for exactly how to prove it and I can't. ^_^ Thanks for any help!
  2. jcsd
  3. Oct 4, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    This relationship is true in general, not just for fringes. Examine the geometry of the Newton's rings set up: A spherical convex lens placed upon a flat piece of glass. Draw a diagram with the quantities r, t, and R indicated.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook