An electron moving with speed v and a pno with speed c, have same D-Broglie wavelength. The ratio of kinetic energy of electron to that of photon is :
1
\(\frac{3 c}{\mathrm{v}} \)
2
\(\frac{\mathrm{v}}{3 \mathrm{c}} \)
3
\(\frac{\mathrm{v}}{2 \mathrm{c}}\)
4
\(\frac{2 \mathrm{c}}{\mathrm{v}}\)