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September 5, 2015

Homework Help: AP PHYSICS

Posted by Stephy on Saturday, April 26, 2008 at 11:38am.

An owl has good night vision because its eyes can detect a light intensity as small as 5.0*10^-13W/M^2. What is the minimum number of photons per second that an owl eye can detect if its pupil has a diameter of 8.5nn and the light has a wavelength of 510nm?

Can anyone please give me some ideas to do it? THANKS A LOT!

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