Question

In the above question , what would be the angular momentum of $H_{\gamma}$ photon if the angular momentum of the system is conserved

• A. $\hslash$
• B. $\text{2 }\hslash$
• C. $\text{3 }\hslash$
• D. $\text{4 }\hslash$

Answer 1

Answer: (C)

$\text{3 }\hslash$

Answer 2

According to Bohr’s atomic model, angular momentum $L_{n} = nh$

If the angular momentum of system is conserved then angular momentum of emitted photon = change in angular momentum of electron corresponding to the transition from n = 5 to n = 2

$\therefore L = L_{5} - L_{2} = 5h - 2h = 3h$