I WONDER - What Is Refraction?

The video explains how light waves bend when their speed is affected by different materials, such as water and glass, causing phenomena like objects appearing bent underwater. It also discusses the speed of light in a vacuum, which is 300,000 kilometers per second, and how it takes light 1.255 seconds to travel from the moon to Earth and over 8 minutes from the sun to Earth.

What new insight or understanding did you gain from this video?