Show HN: What if the speed of light was 5 km/h?
By dmitrybrant · 2026-09-10 · 36 points · 24 comments
https://rivendell.dmitrybrant.com/relativity/
I've always wanted to make a visualization where the speed of light was scaled down to human speeds, so that we could intuit relativistic effects with everyday objects. And here is the first version of it!
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