Question:
What is the experimental evidence in support of the idea that electronic energies in an atom are quantized?
Solution:
The bright-line spectrum shows that the energy levels in an atom are quantized. These lines are obtained as a result of electronic transitions between the energy .and if
the electronic energy levels were continuous and not quantized or discrete; the atomic spectra would have shown a continuous absorption(from lower to higher energy
level transition) or emission (from higher to lower energy level transition.