with pupil area 10^-6 m^2

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The minimum intensityof light to be detected by human eye is 10^-10 W/m^2. The number of photons of wave length 5.6 x 10 ^-7 m entering the eye, with pupil area 10^-6 m^2, per second for vision will be nearly
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Sep
The minimum intensityof light to be detected by human eye is 10^-10 W/m^2. The number of photons of wave length 5.6 x 10 ^-7 m entering the eye, with pupil area 10^-6 m^2, per second for vision will be nearly per second for vision will be nearly The minimum intensityof light to be detected by [...]
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