A rainbow is shown Sept. 10, 2022, behind a stone gate for Fort McCoy, Wis. The rainbow appeared just as the sun was setting and as a passing rain shower was taking place. According to the National Geographic Society, a rainbow is a multicolored arc made by light striking water droplets. The most familiar type rainbow, including this seen by Fort McCoy, is produced when sunlight strikes raindrops in front of a viewer at a precise angle. The colors on a primary rainbow are always in order of their wavelength, from longest to shortest: red, orange, yellow, green, blue, and violet.

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Keywords: environment, formation, fort, mccoy, nature, rainbow, wisconsin