## General Chemistry (4th Edition)

E = hc/λ = (6.626 x 10$^{-34}$) x (3 x 10$^{8}$) / 510 x 10$^{-9}$ = 3.9 x 10$^{-19}$ J No. of Photons = 2.35 x 10$^{-18}$ / 3.9 x 10$^{-19}$ = 6.08 photons