Question

o compunere lunga și în același timp cu date istorice despre evoluarea becului. am proiect de făcut cu aceasta temă, pe notă! Cat de lunga posibil. ​

Answer 1

inimaginea asta este unul dintre primele becuriii...

Ce este becul ..

An electric light bulb is an electric incandescent lamp that produces light by passing an electric current through a filament. It consists of a base and a glass flask vacuumed or filled with an inert gas, inside which is the filament. The incandescent filament is protected and protected from possible oxidation in air by the glass flask. In a halogen lamp, evaporation of the filament is prevented by a chemical process that re-deposits metal vapors in the filament.

Creatori becului sunt ..

The main inventors are:

1878, Joseph Swan - carbon filament lamp

1879, Thomas Alva Edison - the principle of the vacuum balloon

1906, Carl Auer von Welsbach - osmium and tungsten filament

1909, William David Coolidge - for the ductile tungsten filament

1911, Irving Langmuir - spiral filament and the use of inert mixture

The incandescent heating of the filament by the electric current is due to the Joule effect.

•SCURT ISTORIC

Before the light bulb was created, people used fire and they created candles

traducerea - înainte ca becurile sa fie create omul se folosea de foc si au creiat lumanari

Ce foloseau oameni inainte ca becul sa fie creat ..

1. fire

2. candles

3. gas lighting