Find ratio of velocities of electrons in `2^(nd)` excited state of `Li^(+2)` ion `& 3^(rd)` excited state of H-atom.

Options

A. A 25 eV photon can set free the electron from the second excited state of this sample
B. two different types of photon will be observed if electron make transition up to groun state from the second excite state
C. if 23 eV photon is used for electron in `2^(nd)` excited statye then KE of the ejected electron is 1 eV
D. `2^(nd)` line of balmer series of this sample has same energy value as `1^(st)` excitation energy of hydrogen atoms

Answer

A