Question

the human eye is able to detect as little as 2.35×10−18 j of green light of wavelength 510 nm. calculate the minimum number of photons of green light that can be detected by the human eye.

Answer 1

The minimum number of photons of green light that can be detected by the human eye is 6.

Given that;

E = nhc/λ

E = energy of the photon = $2.35 * 10^-18$ J

n = number of photons = ?

h = Planks constant = $6.6 * 10^-34$ Js

c = speed of light = $3 * 10^8$ m/s

λ = $510 * 10^-9$ m

Making number of photons the subject of the formula;

n =$2.35 * 10^-18 * 510 * 10^-9 / 6.6 * 10^-34 * 3 * 10^8$

n = 6 photons

Learn more: brainly.com/question/9260704