Answer
The electron microscope seems more practical because the electron microscope requires less energy than that of light microscope.
Work Step by Step
In the previous sections of this problem, we have seen that
the minimum electron energy required for electron microscope is
$E_e=14.87$ $eV$
and The minimum photon energy required for light microscope is
$E_{ph}=120$ $keV$
Now, we can say that the electron microscope seems more practical because the electron microscope requires less energy than that of light microscope.
