Final answer:
The emission of light with a longer wavelength occurs when an electron transitions from a higher to a lower energy level in a hydrogen atom, a principle exemplified by the Balmer series transitions.
Step-by-step explanation:
The transition that will lead to the emission of light with a longer wavelength is A. Higher to lower energy levels. When an electron in a hydrogen atom undergoes a transition from a higher energy level to a lower energy level, it emits a photon. The energy of this photon corresponds to the difference in energy between the two levels. The longer the wavelength of light emitted, the smaller the energy difference between the two levels. This principle is seen in phenomena such as the Balmer series transitions, which involve electrons transitioning from higher numbered energy levels (n ≥ 3) down to the second energy level (n = 2).
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