What caused this red-only rainbow?

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RAINBOWS

What causes a monochromatic red rainbow? - Quora

Rainbow

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What causes a monochromatic red rainbow? - Quora

Rainbow

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Rainbows Dear WorldSincerely, Science

Why do LEDs have only RGB (Red, Green, Blue) colors why not others? - Electrical Engineering Stack Exchange

Different Kinds of Rainbows, Our Blog, rainbow