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Angular momentum is best expressed as a vector, 1= (!,!y,lz). In quantum mechanics, the
corresponding operators are given by: L = (Îz, Îy, Îz), where,
Î, = -ih (y
dz
Îy
Î, = -ih (r-
-ih
2.
dz
(a) Evaluate | L4, Ly and express your result in terms of L̟. (Hint: In this case, your
placeholder function should be f(x, y, z).)

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