The human eye is sensitive to yellow-green

Question

The human eye is sensitive to yellow-green light having a frequency of about 5.5  10¹⁴ Hz (a wavelength of about 550 nm). What is the energy in joules of the photons associated with this light?

Answer 1

The equation for the energy of a photon is

E = h × f

E = photon energy

h = Planck's constant = 6.62607015×10⁻³⁴ J⋅Hz⁻¹

f = wave frequency = 5.5  10¹⁴ Hz

So, E = 6.6 x 10^-34 x 5.5 x 10¹⁴ J = 36.3 x 10^-20 J = 3.6 x 10^-19 J