Question

2. 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=2.18 × 10-18 J atom--and h= 6.625 x 10-34 J s)
(a) 1.54 x 1015 s (b) 1.03 x 1015 s-1
(c) 3.08 x 1015 s-1 (d) 2.00 1015 s-1​

Answer 1

here's the answer and hope this helps you.