The minimum intensity of light to be detected by human eye is `10^(-10) W//m^(2)
Channel: Doubtnut
Date: 2020-01-19

The minimum intensity of light to be detected by human eye is `10^(-10) W//m^(2)`. The number of photons of wavelength `5.6 xx 10^(-7) m` entering the eye , with pupil area `10^(-6) m^(2)` , per second for vision will be nearly