Question

The maximum wavelength of light that would excite an electron from energy level n = 1 to n =3 in atomic hydrogen is
102 nm
1 nm
10 ^ - 7 *m
487 nm​

Answer 1

Answer:

102nm

Energy of 1st orbit =−13.6ev

Energy∝n21

 Energy of 3rd orbit =9−13.6=−1.51ev

ΔE=12.09ev

λhc=12.09ev

  λ=102nm