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Isaac newton was born on December 25th, 1642. A newborn infant can see light immediately (although their ability to focus takes a couple of months to develop), so assuming that his eyes were not forced shut for a while after his birth, he would have "discover"ed light on that day.

On the other hand, his optical receptors may have been able to pick up strong light while he was in the womb, if that light was powerful enough to penetrate. The eyes are usually developed after the twelfth week of pregnancy, so he may have actually first discovered light in late June or early July of that year.

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13y ago

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Q: What year did Isaac newton discover light?
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