Show HN: What if the speed of light was 5 km/h?

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. Here is the first version of it!




Comments URL: https://news.ycombinator.com/item?id=49637385


Points: 262


# Comments: 107

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https://news.ycombinator.com/item?id=49637385

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https://rivendell.dmitrybrant.com/relativity/

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dmitrybrant

id: 6590
uid: F2nLs
insdate: 2026-09-10 08:05:22
title: Show HN: What if the speed of light was 5 km/h?
additional:

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. Here is the first version of it!




Comments URL: https://news.ycombinator.com/item?id=49637385


Points: 262


# Comments: 107


category: Hacker News
md5:
guid: https://news.ycombinator.com/item?id=49637385
source_url: https://rivendell.dmitrybrant.com/relativity/
updated:
image:
author_name: dmitrybrant
author_link:
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