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Assume that a dark-adapted eye is "noticing" a green light leak with 500 nm wavelength, and...

Assume that a dark-adapted eye is "noticing" a green light leak with 500 nm wavelength, and an intensity of 2.9 picoWatts per meter squared at the eye. If the pupil diameter is 3.9 millimeters, at most how many photons of green light are hitting the pupil?

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