1.

According to Bolir's theory, the energy of an electron in hydrogen atom starts corresponding to n=1,2,3,4 is -13.6 eV, -3.4 eV, - 1.51 eV and -0.85 eV respectively. In order to obtain emission of H_(beta) line of Balmer series, the energy that has to be given to a normal hydrogen atom is

Answer»

`12.75eV`
`14.45eV`
`2.55eV`
`4.25eV`

SOLUTION :The hydrogen atom in the ground state `(-13.6eV)`
MUST be excited to the energy LEVEL with n = 4 (i.e., `-0.85eV`) must be excited to the energy level with n = 4 (i.e., `-0.85eV`) so as to have `H_(BETA)` line.


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