Question 127 of 227

If a photon has velocity c and frequency v, then which of following represents its wavelength 
(a) $\frac{\mathrm{hc}}{\mathrm{E}}$             (b) $\frac{\mathrm{hv}}{\mathrm{c}}$
(c) $\frac{\mathrm{hv}}{{\mathrm{c}}^2}$             (d) hv