Is the light bulb simple or compound why?

Answer 1

The light bulb is pretty simple, also known as a incandescent light bulb, incandescent lamp or incandescent light globe, they are a source of electric light that works by incandescence (a general term for heat-driven light emissions which includes the simple case of black body radiation). An electric current passes through a thin filament, heating it until it produces light. The enclosing glass bulb prevents the oxygen in air from reaching the hot filament, which otherwise would be destroyed rapidly by oxidation. Incandescent bulbs are also sometimes called electric lamps, a term also applied to the original arc lamps. They are pretty simple on how they work, but weve invented new ways of lighting.Almost every news story about global warming recommends that consumers switch from incandescent light bulbs to more efficient compact fluorescent light bulbs, or CFLs. These CFl bulbs are more intercut, and harder to understand how they work for some people. But are CFLs really that good for the environment? Incandescent light bulbs use electricity to heat a filament to a white-hot state, producing light. Yet 90 percent of the energy used is wasted as heat, according to General Electric's Web site. Compact fluorescent light bulbs use electricity to excite gas within a glass tube. The gas fluoresces, producing ultraviolet light which the human eye cannot see. This UV light then reacts with Mercury and a phosphorescent chemical compound inside the tube to create visible light. Because CFL bulbs do not use heat as the lighting mechanism, less energy is spent to create an equivalent amount of light.