# Spin angular momentum?

1. Apr 29, 2007

I am new to this forum.
Well anyway that is not important.
My question
Spin angular momentum$$=\fract{h}{2 \ pi}\sqrt{s(s+1)}$$ when s is $$\fract{-1}{2}$$ then isnt the spin angular momentum complex.

Last edited: Apr 30, 2007
2. May 1, 2007

### chemisttree

What is 's' in your equation? Can it have a negative value? Review the definition of terms for this equation.