The One-Way Speed of Light

When Einstein developed his Special Theory of Relativity, he assumed that light travelled at the same speed between two points no matter which direction it was moving in. But is that really the case, and would the Universe look any different if it were not?

Veritasium on X: If the speed of light is different in different directions, wouldn't the universe look different one way than the other? The short answer is no. The long answer explaining

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The One-Way Speed of Light - Again!

͑ a ͒ Schematic diagram of the experiment to determine the one-way

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The One-Way Speed of Light

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