24 January 2010
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Q.What did albert einstein invent? Was it the lightbulb?
A.Einstein didn't invent the light bulb or anything else. He discovered the theory of relativity. The light bulb was invented by Swan & refined by Edison.
Q.Who invented the lightbulb
A.Joseph Swan demonstrated the carbon filament lightbulb 10 months before Edison. Swan received a UK patent in 1878, Thomas Edison a US one in 1879.
Q.What gas is used in light bulbs
A.Modern lightbulbs are commonly filled with an inert gas such as argon, or argon-nitrate. However, some bulbs are still based on a vacuum.