Structure of the Light Bulb
Light bulb have a very simple structure. At the base, they
have two metal contacts, which connect to the end of electrical circuit. The
metal contacts are attached to two stiff wires. These wires are attached to thin
wire metal filament. The filament sits in the middle of the bulb. It is held up
by a glass mount. The wires and filaments are housed in the glass bulb, which
is filled with a gas, such as argon.
Now when bulb is hooked up to power supply, the electric current
is flow from one end to another end. During this process the electron which are
live in the filament are become excited. In this situation high energy electrons
which are in outer orbit of the atoms are become excited. Electron in the solid
conductor is the mass movement of the free electrons from negatively charged
area to positively charge area.
The electrons are bumping in to the atoms that make up the
filament. Here current heats up the filament. Thinner conductor more easily heats
than thicker conductor. Because it is more resistance to the movement of
electrons.
Bounds electron in the vibrating atoms may be boosted temporally
to a higher energy level. When they fall back to their normal levels, they
release the energy in form of photons. Metal atoms release mostly infrared
light photons, which are invisible to the human eye. But if are they heated to
a high enough level (around 4000 degrees) they will emits good deal of light.
The filament of a light bulb is made of tungsten metal. The metal is arranged in a double coil in order to
fit in a small space. The filament is wound to make one coil, and this coil is
wound to make a larger coil.
Tungsten is used
in all incandescent light bulbs because it is a ideal material…
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