A rainbow is a colorful arc in the sky that appears after rain. - Description, A rainbow is like a painter’s palette in the sky, displaying all colors. - Analogy, The word “rainbow” comes from Old English regnboga, meaning “rain + bow.” - Etymology, Rainbows appear when sunlight passes through raindrops, bending and reflecting light. - Principles of Operation, Unlike a halo, which forms around the sun, a rainbow only appears after rain - Contrast, A rainbow is a meteorological phenomenon, which is a type of natural event producing visible light. - Classification, Rainbows have fascinated humans for centuries and appeared in many myths. - History, A rainbow appears as a colorful arc due to sunlight hitting raindrops. - Cause and Effect, Examples of rainbows include the ones seen over Niagara Falls and tropical regions. - Examples, A smartphone is like a mini-computer because both can run apps, store information, and connect to the internet. - Comparison,

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