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What radiates its own light?

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Anonymous

∙ 16y ago
Updated: 8/18/2019

Anything that gives off light can be said to radiate its own light. There are different types of light emission: incadescence, flourescence, chemiluminesence, and electroluminescence. Of all of these methods, only chemiluminescence is self contained - all other forms of light emission require an external source of energy. Only chemoluminescent materials, therefore, can be said to radiate their own light.

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Glow sticks are an example of chemoluminescent materials. Two chemicals in the stick are kept separate by a membrane. When the stick is bent sharply, the membrane ruptures, and allows the two solutions to mix and interact, thereby creating a chemoluminescent reaction.

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Bioluminescence is a naturally occurring example of chemoluminescence. Fireflies have light emitting organs that combine an enzyme (luciferase) with a pigment (luciferin), and the combination of these chemicals results in a chemoluminescent reaction.

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One could also argue that the sun, and all stars, are also self contained, and they therefore also radiate their own light.

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Wiki User

∙ 16y ago

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