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- Resources
- https://poligonia.ru/free
- Author
- Polygonia
- Printed File Format
- Page(s)
- 4
- Part(s)
- 20
- Instruction Format
An electric current heats the tungsten filament in an incandescent lamp to 2500 degrees Celsius. At the same time, it emits light close to daylight in brightness. But the efficiency of an incandescent lamp is only 5%, and the remaining 95% of the energy is spent on heating and thermal radiation. The lamp lives for about 1000 hours. However, there is an "old lady" in the Guinness Book of Records who is more than 118 years old.
Dimentions - 15х10х10см
Dimentions - 15х10х10см
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