Respuesta :
The change of an atom from an excited state to the ground state always requires emission of electromagnetic energy. (d)
It may be visible, but it doesn't have to be ... that depends on how much energy is emitted.
The change of an atom from an excited state to the ground state always requires emission of electromagnetic energy. (d)
It may be visible, but it doesn't have to be ... that depends on how much energy is emitted.