The number of photons that enter the eye
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I am doing an experiment to determine minimum number of photons that enter the eye. I need the surface area of the eye but only a portion through 1 radian of the surface. Can you please show me the derivation for that integral to find the surface area of a portion of the eye through 1rad?
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Solution Summary
We compute the surface area of a circular portion of a sphere with a width of 1 radian in order to estimate the number of photons that enter the eye.
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