Fact #18
June 9, 2026Rainbows are actually full, unbroken circles.
From the ground, we only see the arch because the horizon blocks the bottom half of the rainbow. To see a complete rainbow, you would have to look down from an airplane.
Mini Facts
1
The raindrops bend the sunlight into your eyes; that same light can't be sent to anyone else. Every rainbow is shaped by the place you're standing, which means no two people ever see exactly the same one.
2
They move when you move. Since a rainbow is purely based on the angle between the sun, water droplets, and your eyes, you can never reach the end of one.
3
A double rainbow forms when light is reflected twice inside the raindrops before exiting, rather than just once.