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NEET 2021 Model Test Paper 6

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Question : 18

Total: 180

The minimum intensity of light to be detected by human eye is 10‌−10 W/m‌2 . The number of photons of wavelength 5.6 × 10‌−7 m entering the eye, with pupil area 10‌−6 m‌2 , per second for vision will be nearly :-

100
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