How many photons per second enter the eye

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Reference no: EM13663900

The threshold of dark-adapted (isotopic) vision is 2.0 multiplied by10^-11 W/m² at a central wavelength of450 nm. If light with this intensity and wavelength enters the eye when the pupil is open to its maximum diameter of 8.5 mm, how many photons per second enter the eye?

Reference no: EM13663900

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