The de-Broglie wavelength of an electron is the same as that of a photon. If velocity of electron is 25% of the velocity of light, then the ratio of K.E. of electron and K.E. of photon will be:
1
\(\frac{1}{1}\)
2
\(\frac{1}{8}\)
3
\(\frac{8}{1}\)
4
\(\frac{1}{4}\)