Question

How much energy an electron in the hydrogen atom in ground state should absorb so that its angular momentum changes by $\left( \frac{h}{\pi} \right)$-

• A. 12.1 eV
• B. 10.2 eV
• C. 12.75 eV
• D. 13.05 eV

Answer 1

Answer: (A)

12.1 eV

Answer 2

DL = $\frac{h}{\pi} = n\left( \frac{h}{2\pi} \right) - \left( \frac{h}{2\pi} \right)$

\ n = 3

so energy absorbed = 13.6 – 1.5 = 12.1 eV