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October 26, 2014

Homework Help: physics

Posted by rick on Monday, April 14, 2008 at 9:39pm.

An owl has good night vision because its eyes can detect a light intensity as small as 5.0*10^-13 W/m2. What is the minimum number of photons per second that an owl eye can detect if its pupil has a diameter of 7.0 mm and the light has a wavelength of 545 nm?

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