The ABC of Relativity, by Bertrand Russell, Part 5

Let's journey to sleep with science as we learn more about Einstein's radical new theory of relativity, why geometry is physics when it comes to space-time, and how light spectrums reveal directions of travel. Is it difficult to understand? Eh, it's all relative.

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Read "The ABC of Relativity" by Bertrand Russell at Project Gutenberg: https://www.gutenberg.org/ebooks/67104

Music: "Boring Books for Bedtime" by Lee Rosevere, licensed under CC BY, https://leerosevere.bandcamp.com

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