given an electron has orbital angular momentum and spin angular
momentum, l and s respectively.
given the following relations:
[lx,ly] = ih(bar)lz , [ly,lz] = ih(bar)lx , [lz,lx] =
ih(bar)ly
[sx,sy]= ih(bar) sz , [sy,sz] = ih(bar)sx , [sz, sy\ =
ih(bar)sy
(a) prove first that for an arbitary operator A, B that
AB=BA+[A,B]
(b) show that [lx,l^2] = 0 where l^2 = l*l = lx^2 + ly^2 +
lz^2
(c) show that similarly, [ly,l^2]=0 and [lz,l^2]=0
(d)given that the...