- #1
Moose352
- 166
- 0
I'm pretty new to the particle physics world, and modern physics in general, so bear with me. I also don't have a book yet, so it's kind of messed up I'm a bit confused by a few apsects of feynman diagrams, although my confusion actually lies much deeper. Looking at this diagram http://www.mov.vic.gov.au/scidiscovery/images/mn001708_w150.jpg which shows two electrons repelling, I don't understand why the vertex of the electron on the right is higher than that of the left. Actually, I don't think I even understand the concept of photons mediating the em force. I guess I don't really understand when a particle emits photons, and what implications that has. Can anyone point me to a good online source (until I get a book) or explain?
thanks
thanks