Collaborative Physics Problem Solutions
14.5.22. [Insert the problem statement]
$14.5.22.$ What is the maximum energy that photons with energy $\mathcal{E} = 10 \text{ eV}$ can acquire when scattered on a counter-propagating electron beam with energy $\mathcal{E}_e = 10^{10} \text{ eV}$?
[Insert a concise answer or boxed result]