The frequency of radiation emitted when the electron falls, Chemistry

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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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