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Rainbows are actually full circles. A physicist explains
How to see a full circle rainbow | Earth | EarthSky
If Rainbows Are Circular, Why Do We Only See Arches?
Rainbow - Wikipedia
Rainbows aren't just arcs in the sky — they're actually full circles
What Causes a Rainbow? | NOAA SciJinks – All About Weather
How Are Rainbows Formed? The Science Behind the Colors
Rainbow - National Geographic Society
Full circle rainbow - Met Office
Rainbows: How They Form & How to See Them - Live Science