Physics - Modern Physics Question with Solution | TestHub

Wavelength $(\lambda )=10^{-10}\mathrm{m}$. Velocity of the electron, $v=h/m\lambda$ $$=\frac{6.6\times 10^{-34}}{\left(9.1\times 10^{-31}\right)\left(10^{-10}\right)}=7.25\times 10^6\mathrm{m}/\mathrm{s}\text{. }$$ where $m=$ mass of electron equal to $9.1\times 10^{-31}\mathrm{kg}$ and $h$ is Planck constant equal to $6.6\times 10^{-34}\mathrm{J}-\mathrm{s}$.