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The lightbulb is one of the most important inventions for the 
progress of civilization. In 1879, Thomas Alva Edison first 
showed the world the electric lamp with a bulb that was on for 
48 hours. A few months later Edison presented in his 
laboratory a circuit of 40 lightbulbs which he switched on and 
off, astonishing all the people who came to see this new 
invention.
Light Bulb
Just a month after the presentation, on January 27, 1880, 
Edison received the patent for the lightbulb. The controversy 
came at the time because there were other earlier inventors 
who were shown to have invented lightbulbs before Edison. 
Some of these characters were Joseph Swan, Humphry Davy, 
and Henry Woodward who could prove that they had made 
inventions very similar to Edison's
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ਹਾਈਲਾਈਟਸ

From the Editor - Ruchika Rawan

From the Editor - Ruchika Rawan

The Inventions that have changed the world

The Inventions that have changed the world

‘The War of Currents’ 
 - Thomas Alva Edison Vs Nikola Tesla

‘The War of Currents’
- Thomas Alva Edison Vs Nikola Tesla

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