A monochromatic red laser beam emitting 1 mW at a wavelength of 638 nm is incident on a silicon solar cell. Find the following: a. The number of photons per second incident on the cell b. The maximum possible efficiency of conversion of this laser c. beam to electricity

Explanation:

First we calculate the energy of the photon

E=(Planck constant × speed of light in vacuum)÷ wave length

E=

Next we find the total energy per second

total energy=

Next we calculate the number the photon per second

= total energy ÷ energy of 1 photon

=

answer; equivalent to a one(1) horsepower motor;

no sign of dia of fuel cell