A monochromatic beam of light having photon energy `12.5 eV` is incident on a simple `A`
Channel: Doubtnut
Date: 23/08/2020

A monochromatic beam of light having photon energy `12.5 eV` is incident on a simple `A` of atomic hydrogen gas in which all almost are in the ground state. The emission spectra obtained from this sample is incident on another sample `B` of atomic hydrogen gas in which all atoms are in the first excited state.   Based on above information, answer the following question:  The atoms of sample `B`