Glow refers to the emission of light by a substance that is not a result of heat. This phenomenon can be observed in various forms, such as bioluminescence in organisms like fireflies and certain types of jellyfish, which produce light through chemical reactions. Glow can also occur in materials that absorb light and re-emit it, a process known as fluorescence. The captivating nature of glow has fascinated humans for centuries, inspiring art, science, and technology. From the soft glow of a candle to the vibrant colors of neon signs, the ability to emit light adds beauty and intrigue to our surroundings.