bulb

What is it?

An electric lamp or light bulb is a dispositive that produces light from

electrical energy, this conversion can be done by various methods such as

heating by Joule effect of a metallic filament, by fluorescence of certain

metals before an electrical discharge or by other systems. Currently, there

is technology to produce light with efficiencies of 10 to 70%

Who was it invented by?

On October 21, 1879 Thomas Alva Edison showed for the first time the

electric lamp with a light bulb that was on for 48 hours. On New Year's Eve

that same year, Edison presented in his laboratory in New Jersey a circuit

consisting of 40 incandescent bulbs, which he himself turned on and off to

the amazement of the more than 3,000 people who gathered. Just one

month later, on January 27, 1880, Edison obtained the patent for the light

bulb.

What is it made from?

At the base, they have two metallic contacts which connect to the terminals of an electrical circuit. The metal contacts are connected to two rigid cables which in turn are joined by a thin metal filament. Inside the light bulb there is a gas called argon.

When the bulb is plugged into a power source, an electric current flows from one contact to another, through the wires and the filament. This produce the light.

What can it do:

The light bulb is an object whose objetive is to produce light in a place where there ins´t any ligh and we want to see there.

How has it changed over the years?

How has it changed over the years?

1. Halogen lamp: around the year 1940 appeared on the market the revolutionary halogen lamp, the evolution of the incandescent bulb that consisted of a tungsten thread wrapped by halogen materials heated to produce light

2. Fluorescent lamp practically on a par with the halogen lamp, fluorescent lighting was put on sale. I consisted of a glass tube with tungsten filaments at the ends that revolutionize the atoms of chemical components inside them to radiate light.

3.The LED: at the end of the 20th century it was invented and works at low voltage. Nowadays we have this light bulb on the market.

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