1.

The ratio of the energies of the hydrogen atom in its first excited state to second excited state is

Answer»

`(1)/(4)`
`(4)/(9)`
`(9)/(4)`
`(4)/(1)`

SOLUTION :`(r_(2))/(r_(1)) =((2)/(3))^(2)= (4)/(9)` . Here, firstexcitedstatecorresponds to n = 2 and thesecondexcitedstatecorrespodndsto n = 3 .


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