A monochromatic light soure of frequency f illuminates a metallic surface and ejects photoelectrons. The photoelectrons having maximum energy are just able to ionize the hydrogen atoms in ground state. When the whole experiment is repeated with an incident radiation of frequency `(5)/(6) f`, the photoelectrons so emitted are able to excite the hydrogen atom beam which then emits a radiation of wavelength `1215 Å`. (a) What is the frequency of radiation? (b) Find the work- function of the metal.

A monochromatic light of frequency is incident on a metal surface and ejects photoelectrons. The photoelectrons having maximum kinetic energy are just able to ionise a hypothetical atom in ground state. The energy levels of hypothetical one-electron atom' are given by E_(n)=-(29)/(n^(2)) eV , where n = 1,2,3.....When whole experiment is repeated with an incident light of frequency v//2 , the photoelectrons with maximum kinetic energy are just able to ionise hydrogen atom in ground state. Calculate the work function of the metal

When light is incident on a surface, photoelectrons are emitted. For photoelectrons,

The ionization energy of hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state are excited by electromagnetic radiation of energy 12.1 eV. How many spectral lines will be emitted by the hydrogen atoms

A beam of monochromatic light of wavelength lambda ejects photoelectronic from a cesium surface (W_(0)=1.9 eV) which are made to collide with hydrogen atoms in ground state. The maximum value of lambda for which hydrogen atoms may be ionised is

When the frequency fo light incident an a metallic plate is doubled , the 1KE of the emitted photoelectrons will be :

The ionization enegry of the electron in the hydrogen atom in its ground state is 13.6 ev . The atoms are excited to higher energy levels to emit radiations of 6 wavelengths. Maximum wavelength of emitted radiation corresponds to the transition between

The kinetic energy of photoelectrons emitted by a photosensitive surface depends on the internsity of the incident radiation