That's a really wonderful question @onderakcaalan. Like you said, electrons have mass but photons don't. The few massless particles we know of are photons, gluon (and as some may add) graviton. We know that photons don't interact with each other same with gravitons, only gluon do. We also know that gluon don't interact with photon because it doesn't carry electric charge. But we do observe an interaction between photons and graviton. This interaction is as a consequence of a stress energy tensor.
You are viewing a single comment's thread from:
Thanks for the answer but actually, photons can interact each other with a very very low possibility. If photons are stable they are massless but when they start to move as speed of light then they have a momentum mass. For gluon i do not know exactly but photons and gluons should be interact also if they have a momentum. Gravity and photon interaction is different kind of interaction i think. I need to study this issue by the way:))
There are too many unknowns in particle physics, most of the ideas we have in that area of physics are mostly theories and am sure you know that theories are not laws. The mistake of the classical physicists have taught us not to accept theories based on how logical they are.
Photons has what is known as relativistic mass, it is not really mass. Rather a mass that appears when it moves at a high speed. Remember that normally mass of a body are known to be constant, but relativistic mass increases with acceleration, thus it's not really mass.
I know that only gluon interact with themselves. I really don't know what you mean by graviton and photon is a different kind of interaction, but don't worry. I will be researching on this topic, hopefully before the end of next week, I will be writing an article on that topic, I hope I will be able clear your doubts then.
Thanks for your kind responses. I am looking forward your new article.
You are welcome