Does Light Have a Charge? Mystery Explored

[gonegahgah]

http://www.physorg.com/news166711942.html"

I was told here that light didn't have an attractive/repulsive force (charge)?

 

[humanino]

http://www.physorg.com/news166711942.html"

I was told here that light didn't have an attractive/repulsive force (charge)?

Light by light scattering does not occur only at tree level. Basically, you can have the photons fluctuating simultaneously into two fermion pairs. That forms a closed loop (box) diagram. It's quite interesting and challenging.

 

[gonegahgah]

Thanks humanino.
Sorry I didn't realize you were answering my question until I looked up what a fermion was.