Final answer:
When electrons in an atom return to a lower energy state, the atom emits electromagnetic radiation with a frequency that is determined by the energy difference between the two levels. Without details on the energy levels, the frequency compared to ultraviolet radiation cannot be determined.
Step-by-step explanation:
When electrons in an atom drop from higher energy levels to the lowest energy level, the atom emits electromagnetic radiation. This emission occurs because as electrons move to a lower energy level, they emit a photon with the energy difference between the higher and lower levels. This is explained by E = hv, where E is the energy of the photon, h is Planck's constant, and v is the frequency of the emitted radiation.
The frequency of the emitted radiation could be in any part of the electromagnetic spectrum, depending on the energy levels involved. Therefore, without specific information about the energy levels, the frequency of the emitted radiation relative to ultraviolet radiation cannot be determined. It can be lower, equal, or higher than the frequency of ultraviolet radiation, hence the correct answer is that the frequency of the radiation cannot be determined without additional information.