What makes a lightbulb work?

Answer 1

The incandescent light bulb consists of a glass enclosure (the "envelope") which either contains a vacuum or is filled with a low-pressure noble gas. Inside of the bulb is a filament of tungsten wire, through which an electrical current is passed. As the electrons that travel through the filament bump into the atoms, some of the electrons in the atom may become excited. This means they temporarily boost its energy level and raise to higher orbit. When they fall back, energy is released as photons, a photon being the particle form of light.
To improve the efficacy of the lamp, the filament usually consists of coils of fine wire. For a 60 watt 120-volt lamp, the length of the filament is usually 2 meters or 6.5 feet.

Answer 2

In an electric lamp, electric energy is converted to heat energy and light energy. When current passes through a resistance (filament) heat is generated (I2Rt) where I is the current, R is the resistance and t, the time. This property is called incandescence

The filament first becomes red hot and in a matter of milliseconds, white hot and emits light. Since much of the energy is dissipated as heat, the efficiency of a light bulb is low.

During manufacture, the air inside the bulb is sucked out by vacuum and then filled with inert gas mixture (Argon + Nitrogen) to prevent oxidation of filament.

Answer 3

works by incandescence. An electric current passes through a thin filament, heating it and causing it to emit light. The enclosing glass bulb prevents the oxygen in air from reaching the hot filament, which would be otherwise rapidly destroyed by oxidation.

Answer 4

The filament and the inert gas inside the bulb
The inert gas stops the filament (usually made from tungsten and other materials) from getting burnt

Answer 5

resitstance caused in the filament of the bulb to the flow of current

Answer 6

As long as the interior filament remains intact, the current will flow and you will have glow.

Answer 7

the light switch