Answer & explanation
Correct answer: option 3
$ \lambda_{min} = \frac{hc}{eV}= \frac{12400}{50000}A^0$
$\Rightarrow \lambda_{min} = 0.25A^0$
Correct answer: option 3
$ \lambda_{min} = \frac{hc}{eV}= \frac{12400}{50000}A^0$
$\Rightarrow \lambda_{min} = 0.25A^0$