Exercise 5 | Early Quantum Theory

What is the initial energy level when an electron of a hydrogen atom transitions into n = 2 and emits a photon at 410 nm?

Ephoton = hcλ

and Ephoton = -2.1799 × 10-18 × 1ni2 - 1nf2

 

⇒  1ni2 - 14 = hcλ × -2.1799 x 10-18   = -0.222

1ni2  = 2.76 x 10-2

⇒ ni = 6