What is the angular momentum of an electron revolving in the third Bohr orbit ($n=3$) of a hydrogen

Question

What is the angular momentum of an electron revolving in the third Bohr orbit ($n=3$) of a hydrogen atom?

Professor PC Thomas Classes · Answer

By Bohr's quantization condition, $L = n \frac{h}{2\pi}$. For $n=3$, $L = 3 \frac{h}{2\pi} = 1.5 \frac{h}{\pi}$.