A black rainbow is a real thing; it appears where water drops reflect light away from the viewer. : r/Damnthatsinteresting

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2:00PM Water Cooler 11/8/2022

Plane shadow created a rainbow… : r/Whatisthis

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Exploration into the Physics of Rainbows

Exploration into the Physics of Rainbows

If Rainbows are caused by light refracting through water droplets

Curious Kids: why doesn't the rainbow have black, brown and grey

Can there be a reflection of a rainbow? - Quora

A 10pm blood red night rainbow outside my home in Scotland! : r

Exploration into the Physics of Rainbows

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Rainbow on (behind) the horizon. Origin is behind the curve : r