Which of the following transitions from a hydrogen atom with an electron in the n = 5 state will result in the emission of the longest wavelength of light?
(a) n = 5 ➞ n = 0
(b) n = 5 ➞ n = 1
(c) n = 5 ➞ n = 4
(d) n = 5 ➞ n = 6
(e) n = 5 ➞ n = ∞
Answer: (c) n = 5 ➞ n = 4