Wave motionHard
Question
The minimum light intensity that can be perceived by the eye is about 10-10 W/m2. The number of photons of wavelength 5.6 × 10-7 m that must enter the pupil, of area 10-6 m2 per sec for vision is approximately-
(use h = 6.6 × 10-34 joule-sec)
(use h = 6.6 × 10-34 joule-sec)
Options
A.3 × 102 photons
B.3 × 103 photons
C.3 × 104 photons
D.3 × 105 photons
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