Multiple choice general knowledge science & technology

What Benjamin Franklin invented?

  1. Bifocal spectacles

  2. Radio

  3. Barometer

  4. Hygrometer
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A Correct answer
Explanation

Benjamin Franklin invented bifocal spectacles in the late 18th century to address his own vision problems. He cut two lens types in half and mounted them in a single frame, allowing users to see both near and far objects. The other options are incorrect: radio was developed by Guglielmo Marconi, barometer by Evangelista Torricelli, and hygrometer by Nicolas de Saussure.

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