Why does light bend when it enters glass?
10:24
Why does light slow down in water?
9:50
Is gravity a force?
32:44
The Simple Math Problem That Revolutionized Physics
19:48
Why Are Cooling Towers Shaped Like That?
16:30
Why is light slower in glass? - Sixty Symbols
29:24
Pourquoi la lumière peut « ralentir » et pourquoi cela dépend de la couleur | Puzzles d'optique 3
9:32
Why Does Light REALLY Bend?
13:11