Q139. The condition in which an excited state, such as a metastable state, has a greater population of atoms or electrons than a lower energy ground state is known as:Physics — NUST Mock By IBAGRADS 1 — Question 139 of 200A. Ionized stateB. Stimulated emissionC. Population inversionD. All of thesePractice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →