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.
Rainbows are actually full circles. A physicist explains - Big Think
Curious Questions: Are rainbows actually circular? - Country Life
Here's why rainbows have a curved or arcing shape
Can rainbows form in a circle? Fun facts on the physics of rainbows
Curiosity - How can you glimpse a full-circle rainbow? Get up high
Can rainbows form in a circle? Fun facts on the physics of rainbows
Why Is A Rainbow Curved? Newton's Apple
FACT OR FICTION: A Full Rainbow Is Actually A Complete Circle, Weather Blog
Rainbows are actually full circles. A physicist explains., by Ethan Siegel, Starts With A Bang!
Rainbows are actually full circles. A physicist explains - Big Think
Rainbows are actually full circles. A physicist explains - Big Think
