What minimum energy (in $e V$ ) must electrons have for all the lines of all the series of the hydro

Question

What minimum energy (in $e V$ ) must electrons have for all the lines of all the series of the hydrogen spectrum to appear when the\ hydrogen atoms are excited by impacts of these electrons\

Professor PC Thomas Classes · Answer

For all the series of hydrogen spectrum to appear the electro in the hydrogen atom must\ be knocked out from the k shell. For this the bombarding electron must have an energy\ $=\left|E_{1}ight|=13.6 \mathrm{eV}$.\