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

Among the photoelectrons, emitted due to incidence of light of frequency f on a metal surface , only the electrons having the highest kinetic energy can ionise a hydrogen atom. If this experment is performed with light of frequency 5/6f , the photoelectron having the highest kinetic energy can excite a hydrogen atom and from this excited hydrogen atom a photon of wavelength 1215 Å is emitted . Determine the (i) work function of the metal and

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

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

When the frequency of light incident on a metallic plate is doubled the KE of the emitted photoelectron will be

Among the photoelectrons, emitted due to incidence of light of frequency f on a metal surface , only the electrons having the highest kinetic energy can ionise a hydrogen atom. If this experment is performed with light of frequency 5/6f , the photoelectron having the highest kinetic energy can excite a hydrogen atom and from this excited hydrogen atom a photon of wavelength 1215 Å is emitted . Determine the (ii) value of f. Given h=6.625 xx10^(-34)*s,c=3xx10^(8)*s^(-1), 1 eV=1.6 xx10^(-19)J , ionisation energy of hydrogen =13.62 eV.

The ionization energy 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