1)Luminescence is light given off after a molecule absorbs light.
Chemiluminescence is light given off by a molecule created in an excited state in a chemical reaction.
2)Luminescence is emission of light by a substance not resulting from heat; it is thus a form of cold body radiation. It can be caused by chemical reactions, electrical energy, subatomic motions, or stress on a crystal.
Chemiluminescence is the production of light from a chemical reaction. Two chemicals react to form an excited (high-energy) intermediate, which breaks down releasing some of its energy as photons of light to reach its ground state
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