What does it mean that light "slows down" in glass?
A link to the full video is at the bottom of the screen.
Or, for reference: https://youtu.be/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
3Blue1Brown
3blue1brown, by Grant Sanderson, is some combination of math and entertainment, depending on your disposition. The goal is for explanations to be driven by animations and for difficult problems to be made simple with changes in perspective. Contact and F...