Obviously, you can’t wear a machine that measures atom oscillations around your wrist (unless you have very strong wrists). So, yes, an atomic watch is more accurate than any other kind of watch on the market. It’s estimated that the most precise clock loses one second every 15 billion years, not that anyone has been around long enough to measure it. Yes, even atomic clocks drift, but on average, it’s a drift of a single second every 100 million years, so you aren’t going to notice it. We have yet to create a clock that doesn’t experience some amount of clock drift. A year after you bought the watch, if you were to compare it to the atomic clock, you would inevitably find a noticeable discrepancy. Even if your watch was initially synchronized by the atomic clock, it will drift away. Īll timepieces experience clock drift, which is defined as the desynchronization of a timepiece from its reference clock. Your birthday present from your spouse is likely a fine piece of craftsmanship, but sadly, in the time it’s taken to read this far into this article, it’s probably experienced at least a few microseconds of clock drift. If you own any kind of watch other than an atomic watch, you simply don’t have the most accurate timepiece available. Is an atomic watch really more accurate than my watch? Rest assured, atomic clocks are the most accurate means for measuring the time that science has developed. Understanding the exact mechanism of atomic clocks and how the length of a second was originally determined would involve a much deeper dive into atomic physics. Since it’s easier to measure slower moving targets, and atoms move slower at lower temperatures, the most accurate atomic clocks cool the atoms to the point of almost absolute zero. This is measured by observing the microwave signals that are emitted by electrons during this transition. oscillation) of electrons between energy levels. Specifically, what is being measured is the transition (i.e. The number of caesium oscillations that occurs in a second is 9,192,631,770. The science behind atomic clocks is considerably complex and would take hours to adequately explain, but in the simplest terms possible, an atomic clock determines the length of a second by measuring the number of oscillations of a caesium-133 atom. That probably sounds pretty cool, but now you’re surely wondering, “What makes an atomic clock so accurate?” 5 Are there any Affordable Atomic Watches?.4 So, are atomic watches always accurate?.2 Is an atomic watch really more accurate than my watch?.
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