Some animals, like butterflies and birds, can see even more rainbow colors than humans because their eyes detect ultraviolet light (invisible light)!
Weather - Facts for Kids

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Random Facts About Weather For Kids
Measurement & Detection
Scientists can use special cameras called imaging spectrometers to measure the exact colors in a rainbow by looking at how sunlight spreads out in the sky!
Formation & Science
Wind is created when the sun heats different parts of Earth‘s surface unevenly, causing warm air to rise and cool air to rush in to replace it!
Scientists use special tools like radiometers or imaging spectrometers to measure how bright a rainbow is and how its light spreads across the sky!
The colors of a rainbow make up something called a ‘spectrum’—a Latin word meaning ‘appearance’ or ‘image’!