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The incandescent light bulb was invented by Joseph Swan in Britain and in America by:
AThomas Emmett
BThomas Ellery
CThomas Edison
DThomas Elliot
Answer & Solution
Correct answer: C. Thomas Edison
1. Two inventors reached it within a year of each other.
2. Swan did so in Britain in 1878.
3. Thomas Edison did so in the United States in 1879.
_Source: OpenStax World History Volume 2, Chapter 9, The Second Industrial Revolution._
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