At \(510 \mathrm{~nm}\), the wavelength of maximum sensitivity of the human eye, the dark-adapted eye can sense a 100-ms-long flash of light of total energy \(4.0 \times 10^{-17} \mathrm{~J}\). (Weaker flashes of light may be detected, but not reliably.) If \(60 \%\) of the incident light is lost to reflection and absorption by tissues of the eye, how many photons reach the retina from this flash?