| The history of the light bulb:
During an epoch of antiquity, the Greeks had an oil lamp - a clay or metallic “small kettle” with oil and a wick which is passed through the kettle’s spout. The lamp smoked many centuries because the lamp glass was invented only in the second half of the 18Ith century.
In the middle of the 19th century, kerosene was obtained from petroleum oil and the use of kerosene lamp began. Simultaneously, inventors developed gas and gas burners made their way into their lives. Gas-drop lamps were especially bright. The incandescent gauze mantle made from refractory metals produced light in the gas-drop lamps. These lamps were used till the 30s in our century.
Spirit-drop lamps were also used, in which the spirit was burnt to produce light. In 1802, popular Russian inventor Vasily Petrov made a tremendous invention. If the tips of coal cores are brought closer and a current is passed through them, then a dazzling arched flame, an electric arc flickers between them. In 1849, such arc lamps had been established on the Admiralty tower.
However, coal cores burn and also it is necessary to move them constantly, which is not absolutely convenient. For this purpose, scientists came out with an excellent regulator.
Simultaneously, the Russian scientist Pavel Nikolaevich Yablochkov thought of simply placing the cores close in columns and to place an insulator, which is not a current conductor, between the coal cores. In 1876, the “Yablochkov candle” conquered the entire world — from America to Cambodia.
At the same time, the first electric incandescent lamps - later known as light bulbs - by the American scientist Thomas Edison appeared.
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Depicting a bright idea as a light bulb can be traced back almost as far as the invention of light bulb itself. However only recently media started using "light bulb as human head" idea, which turned out to be successful, or to say literally quite... bright.
