Question

The change of angular momentum for an electrons during electronic excitation between any two successive orbits in hydrogen atom is

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

Difference of angular momentum during excitation between orbits is $\frac{h}{2\pi }.$ For e.g.
Change of angular momentum = $P_{H.O}-P_{L.O}$
$1\to 2:\frac{h}{\pi }-\frac{h}{2\pi }=\frac{h}{2\pi }.$
Similar $2\to 3:\frac{3h}{2\pi }-\frac{h}{\pi }=\frac{h}{2\pi }$