Final answer:
Electroluminescence is the process of giving off light by applying an electrical source of energy.
Step-by-step explanation:
The process of giving off light by applying an electrical source of energy is called Electroluminescence. Electroluminescence is the phenomenon in which a material emits light when an electric current is passed through it. One example of electroluminescence is the light emitted by LED (Light Emitting Diode) lights.