The Electron in a Hydrogen Atom,originally in Level ​N =

Multiple Choice

The electron in a hydrogen atom,originally in level ​n = 8,undergoes a transition to a lower level by emitting a photon of wavelength 3745 nm.What is the final level of the electron?
​(c=​3.00×10⁸ m/s,h=6.63×10^-34 J·s,R_H=2.179×10^-18 J)

A) ​5
B) ​6
C) ​8
D) ​9
E) ​1