Physics - Modern Physics Question with Solution | TestHub

de broglie wavelength, $\lambda =\frac{h}{\sqrt{\stackrel{◯}{R}mk}}$ or $k=\frac{h^{⊛}}{\mathrm{๑}m{\lambda }^{⊛}}$ $=\frac{{\left(6.67\times 10^{-34}\right)}^2}{2\times 9.1\times 10^{-31}\times {\left(1\times 10^{-9}\right)}^2}=1.5\mathrm{eV}$.