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Physics

Signal Attenuation

Quick fact

A radio signal from a transmitter on Earth can travel millions of kilometers into space before becoming undetectable, yet the same signal may drop below usable strength after just a few kilometers on the ground due to atmospheric attenuation.

Why this is interesting

Have you ever noticed how your car radio crackles and fades as you drive away from a city? Why does the same signal that was crystal clear become a whisper of static over distance?