An electron microscope is used to look at an atom of 0.1 nm diameter. If the desired resolution is 0

Question

An electron microscope is used to look at an atom of 0.1 nm diameter. If the desired resolution is 0.005 nm , the minimum energy of the electron should be

Professor PC Thomas Classes · Answer

Required resolution implies $\lambda = 0.005	ext{ nm}$. For an electron, $E = \frac{h^2}{2m\lambda^2} \approx 6 	imes 10^4 	ext{ eV}$.