A stationary helium ion emits a photon corresponding to the first line of Lyman series
Channel: Doubtnut
Date: 2020-08-30

A stationary helium ion emits a photon corresponding to the first line of Lyman series. That photon liberates a photoelectron form a stationary hydrogen atom in ground state. Find the velocity of photoelectron. Take mass of electron `=9.11xx10^(-31)kg` and ionisation energy of hydrogen atom=13.6ev.