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What is the energy of a typical visible photon? How many photons enter the eye pre...

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Physics

What is the energy of a typical visible photon? How many photonsenter the eye pre second when one looks at a weak source of lightsuch as the moon who's intensity is about 4.0e-4 w/m 2? Assume atypical visible wavelength be 550nm and diameter of the eye pupilis 8.0 mm

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The wavelength of visible light is given by 550nmThe energy of a single photon isE hf hc Since h has the dimension energy timehc has the dimension energy    See Answer
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