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

2024-01-08

[public] 3.16K views, 12.9K likes, dislikes audio only

A link to the full video is at the bottom of the screen.

Or, for reference: /youtube/video/KTzGBJPuJwM

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