180 1 year, British chemist humphry davy invented the first electric lamp in the world. This model is very simple. The platinum wire is fixed and electrified, giving off dazzling light. However, due to the high price of platinum at that time and the rapid loss in the experiment, ordinary people could not afford it at all.
Edison improved the filament of the electric lamp. At first, Edison tried 13 months, tried more than 7000 times, and finally made a breakthrough. Edison tried to put the carbonized cotton thread into the light bulb, turned on the power, and the light bulb gave off golden light, which lit up the whole laboratory.
The history of electric light:
At the beginning of the 20th century, carbonized filament was replaced by tungsten filament, and tungsten filament incandescent lamp is still in use today.
Edison and his team invented the incandescent lamp, which was hailed as the first revolution in the field of optics and stood for a hundred years in the field of lighting. Nowadays, incandescent lamps with high energy consumption are gradually withdrawing from the historical stage and being replaced by environmentally-friendly energy-saving lamps.
The electric light was not invented at a certain time, but experienced a long "invention history". Behind a small electric light, there are countless inventors' efforts.