
Can you outrun a flash of light?
Daniel and Kelly’s Extraordinary Universe
00:00
Can You Outrun a Flashlight?
If you go out far enough, the space is expanding fast enough that light will never catch up to you. Most of the rules of special relativity require you to not be accelerating and have constant relative velocity. This one feels like it really contradicts everything you know about special relativity. It actually is a natural consequence of special relativity. And it breaks that rule because it breaks one of the assumptions of special relativity, which is about acceleration.
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