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The minimum number of photons per second? 
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#1
May2210, 12:50 PM

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1. The problem statement, all variables and given/known data
An owl has good night vision because its eyes can detect a light intensity as small as 4.5 1013 W/m2. What is the minimum number of photons per second that an owl eye can detect if its pupil has a diameter of 7.5 mm and the light has a wavelength of 503 nm? 2. Relevant equations I'm not really sure how to begin. Can you help me solve this step by step? Photons per sec= Energy per sec/Energy per photon ?? 3. The attempt at a solution 


#2
May2210, 02:11 PM

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P: 2,155




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