Question

a) Write Einstein's photoelectric equation. Hence explain the inverse linear dependence of the stopping potential on the wavelength of the incident radiation​

Answer 1

Answer:

The inverse linear dependence of stopping potential on the incident wavelength in a photoelectric effect experiment.

To explain,

When a beam of light of specific wavelength (or frequency) strikes on the surface of the metal, the sum amount of electrons ejected from it and kinetic energy of each electron is given by,

K.Emax=λhc−ϕ

Where, V0 is stopping potential.

So, eV0=λhc−ϕ

⇒V0=(ehc)λ1−eϕ

here it is clear that stopping potential is directly proportional to (λ1). Means stopping potential increases when the wavelength of incident light is decreased. See a graph of stopping potential and incident wavelength given below.