|Class 12 Physics Dual Nature Radiation Matter||Result of the Experimental Study of Photoelectric Effect|
In an experiment of photoelectric effect, the intensity () was doubled. Find the change in the following:a) Photoelectric current (i), b) Stopping potential (Vo), and c) maximum kinetic (Kmax) energy of the photoelectrons.
a) From the experiments on photoelectric effect, we know that : i is directly propertion to I. So, photoelectric current gets doubled.
b) We know that stopping potential doesn’t depend on the intensity. So, stopping potential remains unchanged
c) We also know that maximum kinetic energy, doesn’t change with intensity. So, maximum kinetic energy remains unchanged
In an experiment of photoelectric effect, the frequency () of incident light was tripled. Find the change in the following: a) Saturation current (i), and b) work function of metal.
a) Saturation current is independent of frequency. So, saturation current remains unchanged.
b) Work function is always fixed for a given material.