The minimum light intensity that can be perceived by the eye is about `10^(-10). W m^(-2)`.The number of photons of wavelength `5.6xx 10^(-7) m` that must enter the pupil of area `10^(-4) m^2` per second for vision is approximately.

Options

A. `2 xx 10^2` photons
B. `2 xx 10^3` photons
C. `3xx 10 ^4`photons
D. `3 xx 10^5`photons