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Who invented Electric bulb?

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Question : Who invented Electric bulb?

a. Graham Bell
b. Wright brother’s
c. Thomas Edison
d. Newton


Answer : Correct Answer is (c).



The inventor Thomas Alva Edison (in the USA) experimented with thousands of different filaments to find just the right materials to glow well and be long-lasting. In 1879, Edison discovered that a carbon filament in an oxygen-free bulb glowed but did not burn up for 40 hours. Edison eventually produced a bulb that could glow for over 1500 hours.

Courtesy : http://www.enchantedlearning.com/




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