Answer
$l$ is called the orbital quantum number.
$L$ is the angular momentum.
$L = \sqrt{l~(l+1)}~\hbar$
Work Step by Step
$l$ is called the orbital quantum number. The orbital quantum number is an integer such that $l = 0,1,2,3,...$
$L$ is the angular momentum. $L$ is related to $l$ as follows:
$L = \sqrt{l~(l+1)}~\hbar$
