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

Photon with spin 1. But it only has two projection along z. Why?

  1. Jan 23, 2009 #1
    Hi all:
    I am confused about why photon only has two projection along the z-direction. This confusion came from what I read in shankar "printciple of quantum mechanics". In the chapter of field quantization, he explain that because photon must satisfy transverse condition. wave function component along propagation direction is zero. if it is non-zero, it must be remains invariant under rotation (Jz). that is to say, Sz=0 projection is not existed. I don't understand these words meaning. How did he get this conclusion? thanks.
    xfshi
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted



Similar Discussions: Photon with spin 1. But it only has two projection along z. Why?
  1. Two spin 1/2 particles (Replies: 7)

Loading...