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The Pupil Area of the Human Eye Is ~ 1 ×\times

Question 2

Multiple Choice

The pupil area of the human eye is ~ 1 ×\times 10-5 m2.The minimum light intensity that the eye is sensitive to is ~ 1 ×\times 10-10 Wm-2.How many photons per second of wavelength 550 nm does this correspond to?


A) ~300 s-1
B) ~30000 s-1
C) ~3000 s-1
D) ~3 ×\times 10-2 s-1
E) ~3 ×\times 1012 s-1

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