Question

A hydrogen atom is excited to energy level n = 4 Calculate the emitted spectrum lines:
(a) 2
(b) 3
(c) 4
(d) 6

Answer 1

(d) 6
N_E = \(\frac{n(n-1)}{2}\)
N_E = \(\frac{4(4-1)}{2}\)
N_E = 6