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Question

What Benjamin Franklin invented?

A
Bifocal spectacles
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B
Radio
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C
Barometer
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D
Hygrometer
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Solution

The correct option is A Bifocal spectacles
Benjamin Franklin Invented Bifocal spectacle in 1760. Benjamin Franklin's had poor vision and needed glasses to read. He got tired of constantly taking them off and putting them back on, so he decided to figure out a way to make his glasses let him see both near and far. He had two pairs of spectacles cut in half and put half of each lens in a single frame. Today, we call them bifocals.

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