Answer :
Final answer:
The electron transition that results in emission of energy is D) 4p to 4s, as it involves the electron falling from a higher energy state to a lower one.
Explanation:
The correct option for the electron transition that would result in the emission of energy is D) 4p to 4s. When an electron falls from a higher energy level to a lower energy level, it emits a photon of energy. This is a fundamental principle in quantum mechanics and is well-documented in the study of atomic spectra.
Regarding the transitions in hydrogen, when an electron transitions from n=3 to n=1, it emits a photon, indicating an emission process. The energy in this transition is calculated using the formula , which gives a negative value signifying emission. The colour of the light observed during this transition corresponds to the wavelengths of the visible spectrum with specific energy changes producing specific colours.
