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

B More photon questions

  1. Aug 2, 2016 #1
    [Moved from https://www.physicsforums.com/threads/if-a-photon-were-trapped-between-two-perfect-mirrors.880490/ because it's a different question]

    Hi, ed. Could you explain what you mean by interference between photons? Is there a wavelength smaller than 0.1nm for EM radiation?
     
    Last edited by a moderator: Aug 2, 2016
  2. jcsd
  3. Aug 2, 2016 #2

    edguy99

    User Avatar
    Gold Member

    What is interference between photons? - If you shoot a second stream of 630nm photons, you see wave like interference patterns that suggest something periodic of that size. Some photons reinforce other photons and it looks bright. Some photons interfere with other photons and you cant see anything at all.

    Smaller size? - sure you can start with a smaller wavelength photon. But smaller wavelength means higher energy. If you get small enough, the photon will have enough energy to blast itself right through the wall.

    Also dont forget that you cannot "squeeze" photons to make them smaller. Photons either crash into something where they disappear and transfer their energy to a molecule; or certain crystals can split them in 2, but produce two photons at 1/2 the energy and twice the wavelength (bigger).
    .
     
  4. Aug 3, 2016 #3

    DrClaude

    User Avatar

    Staff: Mentor

    EM waves interfere with each other, not photons.
     
  5. Aug 3, 2016 #4
    X-rays typically have wavelengths in the range of 0.01-10 nm. Gamma rays are usually below 0.01nm, but the distinction between the two is usually given by the source of the radiation, not on the wavelength.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: More photon questions
  1. Photon questions (Replies: 25)

Loading...