Multiple choice general knowledge science & technology

What Benjamin Franklin invented?

  1. Bifocal spectacles

  2. Radio

  3. Barometer

  4. Hygrometer
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Benjamin Franklin invented bifocal spectacles around 1784 to correct both near and far vision. He did not invent the radio (Marconi/Tesla), barometer (Torricelli), or hygrometer (multiple inventors). Franklin's other inventions include the lightning rod, Franklin stove, and the flexible urinary catheter.

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