Jun 9, 2013

Fluorescence light

Under certain conditions, atoms take in an invisible form of energy, and give it out as visible light. This is fluorescence. A fluorescence light is a glass tube filled with mercury vapor. When electricity flows through the gas, the mercury atoms take up the electrical energy and give it out as invisible ultra-violet rays. These rays hit a phosphor coating inside the tube. The phosphor atoms convert it to white light. (World of Science)