A) \[10.2\,eV\]
B) \[1.9\,eV\]
C) \[12.09\,eV\]
D) \[12.6\,eV\]
Correct Answer: C
Solution :
For emission of photon corresponding to the target wavelength the transition of electron will be from \[n=3\] to \[n=2\]. Hence, after collision of electron with the hydrogen atom, the hydrogen atom will have excited to the state whose quantum number n is at least equal to 3 Minimum energy of colliding electron, \[\varepsilon =13.6\left( \frac{1}{{{1}^{2}}}=\frac{1}{{{3}^{2}}} \right)\] \[\Rightarrow \] \[\varepsilon =12.09eV\]You need to login to perform this action.
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