Problem #0012 Quantum Physics Problem #0014 Chapters Chapters


Problem 49.32 (RHK)

Under ideal conditions the normal human eye will record a visual sensation at 540 nm if incident photons are absorbed at a rate as low as. We have to find the power level to which it corresponds.

Solution:             Click For PDF Version

Energy of a photon of wavelength 540 nm is

As eye is able to record a visual sensation when 100 photons are absorbed per second, the power level of the eye is