Question

how do the transfer of electrons take place one Orbit to another

Answer 1

Transfer of electrons can take place only when we increase energy in electron....but this is arbitrary...

Answer 2

The higher the excitation state, the more energy the electron contains. When an electron absorbs energy, it jumps to a higher orbital. An electron in an excited state can release energy and 'fall' to a lower state. When it does, the electronreleases a photon of electromagnetic energy.