December 20
December 20
An incandescent light bulb, incandescent lamp, or incandescent light globe is a type of electric light that uses a wire filament that is heated until it lights. To protect the filament from oxidation, it is encased in a glass bulb with a vacuum or inert gas. The filament was the source of the difficulty with Swan's design, Edison understood. A thin filament with a high electrical resistance would make a lamp feasible since it would only take a little amount of electricity to light up. In December 1879, he displayed his lightbulb.
Shortpedia is a short news app which provide latest news in 70 words in Hindi or English Language. Read Breaking News on our Mobile App which is available on Google Play Store & Apple App Store.