The eyes of certain reptiles pass a single visual signal to the brain when the visual receptors are struck by photons of a wavelength of 850 nm. if a total energy of 3.15 × 10−14 j is required to trip the signal, what is the minimum number of photons that must strike the receptor?

Explanation:

It is given that,

Wavelength of the photon,

Total energy required to trip the signal,

Let n is the minimum number of photons that must strike the receptor. Firsly calculating the energy of one photon as :

Let n is the number of photons that must strike the receptor. It can be calculated as :

n = 134615.38

or

So, number of photons that must strike the receptor. Hence, this is the required solution.