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

About susceptibility

  1. Sep 30, 2009 #1

    KFC

    User Avatar

    I am reading a paper on applying an external field on a two-level system. And it turns out that at some frequency (of the field), the imaginary part of the susceptibility become very close to zero. I wonder what's the physical significance when imaginary part of the susceptibility is ZERO?

    Thanks.
     
  2. jcsd
  3. Oct 3, 2009 #2

    Dr Transport

    User Avatar
    Science Advisor
    Gold Member

    The imaginary part of the susceptibility is a related to the absorption, hence when it is zero, or nearly so, there isn't any absorption in the system.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook