system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: what’s the difference between a white surface and a mirror?

A mirror is just a surface that reflects light, and white is just all colours mixed together, so a white surface is just one that reflects all light. So why is one monochrome whilst the other is a reflection?
gpt
If a beam of light hits a white surface, it scatters in all directions. If a beam of light hits a mirror, it reflects in one particular direction.

The result is that you can see reflected images in a mirror while a white surface just creates a single color that is a mash-up of all the incoming light.