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Solved: Owls have good night vision because their eyes can
Chapter 7, Problem 141P(choose chapter or problem)
QUESTION:
Owls have good night vision because their eyes can detect a light intensity as low as \(5.0 \times 10^{−13}~\mathrm {W/m^2}\). Calculate the number of photons per second that an owl's eye can detect if its pupil has a diameter of 9.0 mm and the light has a wavelength of 500 nm. (1 W = 1 J/s.)
Questions & Answers
QUESTION:
Owls have good night vision because their eyes can detect a light intensity as low as \(5.0 \times 10^{−13}~\mathrm {W/m^2}\). Calculate the number of photons per second that an owl's eye can detect if its pupil has a diameter of 9.0 mm and the light has a wavelength of 500 nm. (1 W = 1 J/s.)
ANSWER:Step 1 of 4
From the given,