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    What is light, what is it made of, how do we know, and could you trap light (theoretically) forever in a mirror ball, and would it ever slow down or change its speed, and how do we guess that?

    Question #34212. Asked by student. (May 23 03 12:06 AM)


    jackolant

    		Light is waves, like radio waves or micro waves. Various people have done experiments to discover this-including Newton. Light cannot change its speed-even time needs to adapt so that can be the case. If there was a source of light in a mirror ball it would be trapped there, but it would also be trapped if it was an ordinary ball.

    May 23 03, 7:46 AM
    greencavalier

    		If the mirror ball mirrors were perfect mirrors, i.e. 100% reflecting, then I guess the light wave would buzz around in there for ever! But in practice at every reflection a little energy is absorbed by the mirror, so the light would fade away.

    May 23 03, 6:35 PM

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