On the wikipedia page, on renormalization, it says the following: "Renormalization replaces the initially postulated mass and charge with new numbers such that the observed mass and charge matches those postulated initially."
I am confused as to what this means. It just said the initially postulated mass and charge replaced. Isn't it contradicting itself? The whole sentence sounds very confusing. Arent you supposed to measure some values first and then plug them into your calculation and get some values that get close to what the bare mass and charge should be ( although they are impossible to measure)
I remember being told the values that get measured have to do with the scales on which experiments are being conducted (electron mass and charge for example) and one can never measure bare mass and charge because of virtual particle cloud surrounding ans interacting with them. I would really appreciate it if someone could translate the wikipedia statement in plain english.