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How Atomic Clocks Actually Keep Time
When Daniel asked whether atomic time is based on physical material degradation, he uncovered one of the most common misconceptions about how we actually measure time. This episode explains how cesium atomic clocks work — measuring the frequency of electron transitions, not radioactive decay — and why the second was officially redefined in 1967 based on that atomic process. We explore why astronomical time turned out to be unreliable (the wind literally changes how fast the Earth spins), how Coordinated Universal Time (UTC) bridges atomic and solar time via leap seconds, and why those leap…
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