the frequency of radiation emitted when the

Question

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