Class 12 NEET Physics Dual Nature of Matter and Radiation

The electron in the hydrogen atom jumps from excited state (n=3) to its ground state (n=1) and the photons thus emitted irradiate a photosensitive material. If the work function of the material is 5.1eV, the stopping potential is estimated to be (the energy of the electron in nth state En=−

13.6

n2

eV)