|May22-10, 12:50 PM||#1|
The minimum number of photons per second?
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 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 7.5 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
|May22-10, 02:11 PM||#2|
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