What is the meaning of an upside-down rainbow?

Bottom line: When you see what looks like an upside-down rainbow, you're likely seeing a circumzenithal arc. It's related to the halos often seen around the sun or moon, caused by ice crystals in the upper atmosphere.

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Is it rare to see an upside-down rainbow?

Circumzenithal arcs are relatively common, though a special set of circumstances are required. The sun needs to be more than five, and less than 32 degrees above the horizon, in order that the sunlight can refract in the correct way through the ice crystals to form the smiling, rather than frowning, halo. Subsequently, what is the inverted rainbow question? This conundrum is often referred to as the inverted-rainbow question. We all agree on the relation of frequency to color name when we see a rainbow, but what if our internal experiences were different?

Moreover, why is a rainbow arched?

The rainbow is curved as it reflects the round shape of the sun. Rainbows are circular because raindrops are spherical. When light from the Sun enters a raindrop it is largely reflected back inside a cone with a half-angle of 42 degrees. People also ask what is a secondary rainbow? Definition of secondary rainbo. : a rainbow that is concentric with and near but somewhat larger and fainter than a primary rainbow and that differs from it in formation in that there are two internal reflections and the red is seen on the inside edge of the bow.

Accordingly, how do you pronounce circumzenithal?