This question can have many answers. For one, I would be enlightened to understand whether two photons can truly create an electron-positron pair, as well I would like to know if a photon is able to change other photon's directional path.
I've read on wikipedia about matter creation and that it is possible to convert two bosons into two fermions, yet I haven't found a single experiment that says this has been done. I as well cannot find anything online that says whether a photon can influence another photon's path.
Finally, I want to just say that my brother has put this idea in my head that photons simply pass through one another without any effect whatsoever, so if you can ingrain a more true to reality understanding of photons affecting one another, that would be phenomenal.
