Inventions

How Do Light Bulbs Work?

Photo by Alexandru Goman on Unsplash

A light bulb is a device that emits light from a thin filament inside a glass or metallic, evacuated lamp. The illumination consists of some combination of visible and invisible components, which may be used to produce white light. Most bulbs use a metal filament that heats up due to electric current passing through it. The heat causes the filament to emit light as it cools down, releasing energy in…