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What general process must happen before luminescence can occur? Question 8Select one: a. exposure to UV light b. input of some kind of energy which

What general process must happen before luminescence can occur? Question 8Select one: a. exposure to UV light b. input of some kind of energy which puts electrons in the ground state (or lowest energy level) c. exposure to kinetic energy d. input of some kind of energy which puts electrons in excited states (or higher energy levels)

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