In an electron transition of hydrogen atom orbital momentum may change by :

Options

A. Hund.s rule
B. `h/pi`
C. `h/(2pi)`
D. `h/(4pi)`

Answer

B, C

Explanation

Change in angular momentum `=(n_2- n_1) = h/(2pi)`
Possible values will be `h/(pi) , h/(2pi) , 3/(2pi) ,….`
(h and `h/(pi)` are not possible )