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!

B How do we detect photons?

  1. May 15, 2016 #1
    How can we detect photons without mass ?

    In the experiment that was showing two photons hitting the detector when only 1 was fired through the slit, how did technology detect photons without mass to hit the detector ?
     
  2. jcsd
  3. May 15, 2016 #2

    Nugatory

    User Avatar

    Staff: Mentor

    Google for "photomultiplier".
    Or you can use a piece of photographic film. When you develop the film, you get a dot wherever a photon landed.

    However, I'm not sure which experiment you mean when you're asking about "the experiment that was showing two photons hitting the detector when only 1 was fired through the slit"
     
  4. May 15, 2016 #3
    Your phone camera is a photon detector more common than PMT. Easy to Google.
     
  5. May 15, 2016 #4

    Drakkith

    User Avatar
    Staff Emeritus
    Science Advisor

    Photons still have energy and momentum, despite having zero mass. Thus they can still be detected.
     
  6. May 15, 2016 #5

    Vanadium 50

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor
    2017 Award

    And your eye is more common than your phone camera.
     
  7. May 15, 2016 #6
    And green leaves are more common than eyes.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Loading...