MCQ
When a hydrogen sample in ground state is bombarded with electron then what potential is required to accelerate electron so that first Bracket line is emitted ............ $\mathrm{eV}$
- A$12.75$
- ✓$13.06$
- C$12.01$
- D$10.2$
✓
Answer
Correct option: B.
$13.06$
b
For first line of Brackett series $e^-$ should be present in $5^{th}$ state.
For first line of Brackett series $e^-$ should be present in $5^{th}$ state.
$E_5 -E_1= -0.54 -(-13.6)$
$= 13.06\, eV$
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