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Does light travel forever? And if it stops, what makes it to stop?

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Ummmm.....well.....the people in this link are having a good discussion about this....
http://www.physicsforums.com/showthread.php?t=206196

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Hi, Nafta. What does your picture mean?
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It depends on the strength of the light. Usually an object or little power makes it stop.

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I think it stops because It comes from outerspace, reflects off of objects and back into our eyes to percieve color.

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Light is absorbed, reflected, and refracted all the time. It is a form of radiation, and it is not infinite.

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Um, dark?

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Light will travel forever, unless it hits something, and is absorbed

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Light will travel forever unless it hits something that absorbs it. However there is a LOT of stuff in the Universe to hit, so very little light travels great distances (thousands of light years).

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if there is no object I'm the way or the surrounding temperature is close to absolute 0 it will go on forever

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