The eye can detect `5xx10^(4)` photons `(m^2s)^(-1)` of green light (`lamda=5000A)`, whole ear can detect `10^(-13)Wm^(2)` . As a power detector, which is more sensitive and by what factor?

The eye can detect 5 xx 10^4 phot ons//ms^2 of light of wavelength 500 nm. The ear can detect 10^-13 W//m^2 . As a power detector, which is more sensitive ?

Eye detects the green light (lambda = 5000 overset@A), 5 xx 10^4 photons per square metre per second and the ear can detect 10^-13 watt per square metre. In form of power detector, the eye is sensitive in comparison to the ear by

Eye of an experimenter detects the green light (lambda =5000 Å) at 5xx10^4 photons per square meter per second and ear can detect 10^-13 watt per square metre. The eye is sensitive as a power detector in comparison to the ear by a factor of

The human eye can barely detect a yellow lings ( lamda=6000A ) that delivers 1.7xx10^(-18) W to the retina. The number of photons per second falling on the eye is nearest to

The human eye can barely detect a yellow lings ( lamda=6000A ) that delivers 1.7xx10^(-18) W to the retina. The number of photons per second falling on the eye is nearest to

Estimate the following the following two numbers should be interesting. The first number will tell you why radio engieers do not need to worry much about a photons. The second number tells you why our eye can never "count photon" even in barely detectable light. (i) The number of photons emitted per second by a MW transmitter of 10kW power emitting radiowaves of length 500m. (ii) The number of photons entering the pupil of our eye per second corresponding to the minimum intensity of white light that we humans can precieve (~10^(-10)Wm^(-2)) . Take the area of the pupil to be about 0.4cm^(2) , and the average frequency of white light to be about 6xx10^(4)Hz. (h=6.6xx10^(-34)J)