Summary
Highlights
The metal film in a mirror does not absorb any colors of light; instead, it reflects all of them back. This complete reflection is why we can see ourselves in a mirror.
The video addresses why snow, despite reflecting all colors of light, doesn't show a clear reflection. The key difference is smoothness: snow has a rough, bumpy surface that scatters light in all directions, while a mirror's extremely smooth metal film reflects light directly, preserving the image.
The video starts with an explanation of how mirrors work, contrasting with how an apple reflects only red light while absorbing others, thus appearing red.
A mirror consists of a glass surface with a very smooth, thin layer of metal film behind it. Light passes through the glass to this metal film.