Multiple choice general knowledge

What Benjamin Franklin invented?

  1. Radio

  2. Bifocal spectacles

  3. Hygrometer

  4. Barometer
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Benjamin Franklin invented bifocal spectacles in the 1780s. He created glasses with two different lenses - one for distance vision at the top and one for reading at the bottom - allowing him to see both near and far objects with the same pair of glasses without constantly switching between multiple pairs.

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