QUOTE : ...How then do they manage with these incorrect equations? These equations<br />lead to infinities when one tries to solve them; these infinities ought not to be there.<br />They remove them artificially. ... Just because the results happen to be in agree-<br />agreement with observations does not prove that one's theory is correct. After all, the<br />Bohr theory [of the hydrogen atom] was correct in simple cases. It gave very good<br />answers, but still the Bohr theory had very wrong concepts.