By A Mystery Man Writer
Most of us only ever see a fraction of a full rainbow: an arc. But optically, a full rainbow makes a complete circle. Physics explains why.
Can rainbows form in a circle? Fun facts on the physics of rainbows
Exploration into the Physics of Rainbows
Curious Questions: Are rainbows actually circular? - Country Life
Here's why rainbows have a curved or arcing shape
Here's why rainbows have a curved or arcing shape
Circular rainbow: Rare optic effect seen from the air.
Curious Questions: Are rainbows actually circular? - Country Life
Explainer: The fundamental forces
How was it discovered that rainbows are full circles and not arcs? What is the backstory and any photos? - Quora
Rainbow - Wikipedia
Earth Shaker - #MeteoFact Rainbows are actually Full Circles! We know rainbows are colorful arches across the sky after a rainfall, however, all rainbows are circular! This might be hard to believe
Here's why rainbows have a curved or arcing shape
Gravity's Rainbow' Finally Came True, 50 Years Later
The subtlety of rainbows – Physics World