Question:
A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference $\mathrm{V}$ esu. If $\mathrm{e}$ and $\mathrm{m}$ are charge and mass of an electron respectively, then the value of $\mathrm{h} / \lambda$ (where $\lambda$ is wavelength associated with electron wave) is given by :
Correct Option: 1
Solution:
$\therefore \frac{\mathrm{h}}{\lambda}=\sqrt{2 \mathrm{meV}}$