The Balmer series of spectral lines at visible wave lengths are emitted....?

Question

.... are emitted by a hot hydrogen gas when the electrons fall from all higher atomic energy levels to the...

A) ionization level, or n = infinity

B) first excited level, n = 2

C) next level down for each level (e.g; n=4 to n=3)

D) ground state, n = 1

a,b,c, or d?

Answer 1

the answer is B. http://hyperphysics.phy-astr.gsu.edu/hbase/hyde.html#c4