The Red Line in the Hydrogen Emission Spectrum Is 656

Multiple Choice

The red line in the hydrogen emission spectrum is 656 nm.If the energy of the nth level is -13.6/n ² eV,then calculate the transition between n levels that this emitted photon comes from.

A) n = 2 to n = 3
B) n = 4 to n = 3
C) n = 5 to n = 2
D) n = 3 to n = 2
E) n = 2 to n = 4