How Fast is Light? 💡
10 months ago
19
How fast is light? 💡 In 1676, Danish astronomer Ole Rømer made a groundbreaking discovery! By observing Jupiter's moon Io, he noticed delays in its orbit that changed with Earth's position. From this, Rømer calculated the speed of light for the first time in history—proving it wasn't infinite! Discover how one astronomer's observations transformed our understanding of light and speed.
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