A photon of wavelength $\;5030 A^{0}\;$ is incident on a totally reflecting surface. The momentum delivered by photon is equal to

Question

$(a)\;6.63\times10^{-27} Kgm/s\qquad(b)\;2\times10^{-27} Kgm/s\qquad(c)\;10^{-27} Kgm/s\qquad(d)\;None$