$ \text{wavelength of photon is }\lambda_p = \frac{c}{\nu} = \frac{3\times 10^8}{6\times 10^{14}}= 5 \times 10^{-7}$

$\text{Wavelength of electron }\lambda_e = 5\times 10^{-10}m$

$\text{Speed of electron } v_e = \frac{h}{m\lambda} = 1.45 \times 10^6m/s$