191020photons per second are emitted by a 70w lightbulb the
1.9*10^20photons per second are emitted by a 70W lightbulb, the wavelength is 550nm. A person can just see this bulb from a distance of 800m, with the pupil diameter dialated to 7.5mm. How many photons per second are entering the pupil?
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1.9*10^20photons per second are emitted by a 70W lightbulb, the wavelength is 550nm. How many photons per second are entering the pupil
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