Rainbows are actually full circles. A physicist explains - Big Think

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.

Here's why rainbows have a curved or arcing shape

Rainbows are actually full circles. - The Daily Cuppa - Medium

Why can't people see a rainbow as a full circle? - Quora

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Rainbows are actually full circles; however, from the ground, we typically see only a semi-circular arc. The reason we don't see the full

Curious Questions: Are rainbows actually circular? - Country Life

How was it discovered that rainbows are full circles and not arcs? What is the backstory and any photos? - Quora