What are the key takeaways from “What They (Probably) Don't Teach You About Rainbows At School” on Veritasium?

What is this episode about?

Rainbows are not physical objects in the sky; they are unique optical illusions generated by billions of individual droplets. Each drop projects a colored cone of light, and because the phenomenon depends on the precise geometric alignment between the sun, the droplet, and your specific eyes, no two observers ever see the exact same rainbow.