Question

calculate the maximum velocity of photoelection of the
Work function of the tangent metal is 1.8 ev & wavelength
of incident light is 400 nm what is retarding potential
to stop the fastest electron reaching the collector​

Answer 1

Answer:

For photoelectric effect to occur, the energy of the photon must be greater than the work function. As the wavelength of the incident light decreases but is lower than the cut-off wavelength, the maximum kinetic energy of the photo electrons increases.......

The maximum kinetic energy KEe of ejected electrons (photoelectrons) is given by KEe = hf − BE, where hf is the photon energy and BE is the binding energy (or work function) of the electron to the particular material.