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The earliest advance in technology that enabled communication over long distances was the telegraph. Then there was the telephone later on.

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10y ago

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Why were long-range radio signals important?

so people could communicate over long distances


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People could communicate quickly over long distances.


How did the invention of the telegraph and telephone affect communication?

People could communicate quickly over long distances.


How did the invention of the telegraph and the telephone affect communication?

People could communicate quickly over long distances.


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How do long wavelength radio waves communicate over big distances?

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