The sodium atom emits light in the wavelength of 330 because light energy is released as a result of the transition from the higher energy electron shell 4p to the lower energy electron shell.
What are atoms?
Atoms are the divisible entity that contains electrons neutrons, and protons in it, it is the smallest and basic point by which the matter is made up of. They are the base unit of every matter.
Atoms contain electrons that are charged particles, and they emit energy when moving to another orbit. This energy is of some wavelength which checks the movement of the electrons.
The orbitals are the different shells present within the atom. They are of different energy levels.
Thus, the electrons contain energy, and when the electron of the sodium atom moves to a lower orbit the wavelength will be low, which is 330 nm.
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