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The frequency of radiation emitted when the electron falls from n= 4 to n=1 in a hydrogen atom will be (Given ionization energy of H = 2.18x 10 -18 J atom-1 and h= 6.625x 10-34Js. )
(1) 3.08 x1015 S-1
(2) 2.00 x 10 15 S-1
(3) 1.54x 10 15 S-1
(4) 1.03x 10 15 S-1
Ans: 3.08 x1015 S-1
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