What does it mean that light "slows down" in glass?

Published: 07 January 2024
on channel: 3Blue1Brown
177,234
13k

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Or, for reference:    • But why would light "slow down"? | Op...  

That video unpacks the mechanism behind how light slows down in passing through a medium, and why the slow-down rate would depend on color.

Editing from long-form to short by Dawid Kołodziej


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