A light bulb that uses a filament is also known as an incandescent light bulb.
All kinds of incandescent lamp, and all types of light bulb contains filament. But there are several kinds of filament applied each type of light bulb.
continuous emission
An incandescent bulb.
The filament is nothing to do with the light turning on, that is controlled by the switch.
The temperature of a bulb filament when it is burning can range from 2,000 to 3,000 degrees Celsius (3,600 to 5,400 degrees Fahrenheit), depending on the type of bulb and the amount of electric current passing through it. This high temperature causes the filament to glow and produce light.
No, the type of bulb and filament will determine life, as well as how many times it is turned off and on. Repetitive on and off cycles will reduce the life of the filament.
You could shine white light through it, divide the light that comes out the other side into the full spectrum of colors, see which colors were absorbed by the bulb and are therefore missing from the spectrum, and consult a table to find out what element corresponds to that pattern of color bands.
A light bulb typically uses electrical energy to produce light. The electricity flows through a filament or gas within the bulb, generating heat and light as a result of the resistance in the filament or the ionization of the gas.
Incandescent light bulbs produce light when a filament made of tungsten wire is heated by an electric current flowing through it. The filament glows and emits light as it reaches high temperatures.
Electrical energy (the electric current) is transformed into thermal energy (by heating the filament to incandescence), and this thermal energy creates electromagnetic energy in the form of light.
The inert gas inside the light bulb prevents the filament from catching fire by creating an oxygen-free environment. This inhibits combustion reactions that would ordinarily allow the filament to ignite.