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If you're talking about electromagnetic waves, like light and radio, there's no limit

on how far they can go once they're emitted.

But they spread out as they travel, and the farther you are from the source, the

thinner the energy is in the part of the wave that you can collect. So the only limit

is: How far away from the source can you detect the waves ? In other words, how

sensitive is your receiver ?

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14y ago

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