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Light Beyond the Bulb

Flight Path Of Fireflies
Outside Okayama city, Japan


flight path of fireflies

Image Credit: Tsuneaki Hiramatu

When a living organism produces its own light, scientists call it "bioluminescence." Fireflies, also called lightning bugs, are some of the best-known examples of this process. Fireflies produce light when an organic compound in their abdomen, called luciferin, interacts with oxygen from the air. When this happens, light with a wavelength of between 510 and 670 nanometers—the color of pale yellow to reddish green—is generated. The special cells that hold the luciferin also contain uric acid crystals that help reflect the light away from the fireflies, making them even brighter for other fireflies and humans to admire.

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