Light from a discharge tube containing hydrogen atoms is incident on the surface of a piece of sodium . The maximum kinetic energy of the photoelectrons emitted from sodium is 0.73 eV. The work function of sodium is 1.82 eV .
(iii) the change in angular momentum of the electron of hydrogen atom in the orbits.

Explanation

According to Bohr's postulate, change in angular momentum
`=4*(h)/(2 pi)-2*(h)/(2 pi)=h/(pi) =(6.625xx10^(-27))/(pi)=2.11xx10^(-27) erg*s`