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!

A Newton's ring

  1. Feb 15, 2017 #1
    Why the center of newton's ring is dark? though I am thinking the path difference in the center is zero between two reflected rays...
    so,I will be glad if u give the correct information about that...
  2. jcsd
  3. Feb 16, 2017 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member
    2017 Award

    As long as the surfaces are in contact the path difference in the middle is zero. If you move them slightly apart you can change this.
  4. Feb 16, 2017 #3


    User Avatar
    Homework Helper

    The phase difference between the two reflected ways counts, and it is not zero, even in the case when the path difference --->0.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted