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!

Mixing of light ?

  1. Jun 10, 2010 #1
    when i mix red light and green light i get yellow light, but QED says that photons do not interact so why am i seeing yellow light, , I know they obey superposition , what does it mean for two photons two superimpose physically . how is the localized energy of the photons interacting .
  2. jcsd
  3. Jun 10, 2010 #2
    What you see here is nothing to do with photons interacting.
    It is a consequence of the way our eyes are sensitive to light.
    The eye has 3 types colour receptor, each sensitive to a different overlapping range of wavelengths of visible light. All the various phenomena relating to the mixing and combining of colours depend on this.
    Wiki has a good article on colour vision.
  4. Jun 10, 2010 #3
    See http://www.handprint.com/HP/WCL/wcolor.html" [Broken] for all the gory details.

    Last edited by a moderator: May 4, 2017
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook