Question

The particle nature of light was first proposed by Albert Einstein, who suggested that light could be described as a stream of particles called photons. A photon of wavelength λ has an energy (E) given by the following equation: E=hc/λ , where E is the energy of the photon in J, h is Planck's constant (6.626×10−34J⋅s), and c is the speed of light (3.00×108m/s).

Calculate the energy of 1mol of photons with a wavelength of 602nm. (answer in Joules please)

Answer 1

Here the wavelength of photon .

As we know

c= velocity of light

h= plank's constant

Now apply

Hence the energy for 1 mole of photon is written as

Answer.