Originally Posted by cbdb
Not that it is derived from alpha which is determined experimentally and will get more acurrate,
thus not constant. Please corect me if im wrong.
With the new SI, mu0 is directly proportional to alpha, with the constant of proportionality equal to 2h/ce^2
where h, c, and e are (now) exact, fixed, fundamental constants. Since alpha is determined experimentally,
therefore so is mu0, with the experimental error % the same for both.
In other words we now have mu0 = K x alpha, where K is a physical constant, and alpha is measured.
Last edited by rayma; Yesterday at 09:18 PM.