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a measurement system created and maintained by a committee which arbitrarily redefines the units to be impossible to replicate or verify yourself is as proprietary as it gets
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@Inginsub imperial is open source because everyone has feet
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@Inginsub The committee only ever redefines the units to improve the accuracy and provides everything you need to replicate or verify it yourself - as a result you can precisely measure the older, less accurate scales in perfect accuracy just fine.
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@RustyCrab Imperial is a UK thing, which they don't really use anymore and the US doesn't use it anymore either.
The USA uses a customary unit system which is based off metric.
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@Suiseiseki go measure 1/299792458th of the duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom
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@Inginsub Yes, I can go and acquire an atomic clock or make one with a microwave heater and a suitable radiation detector just fine.
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@Suiseiseki
>The high frequency of caesium allows for more accurate measurements. Caesium reference tubes suitable for national standards currently last about seven years and cost about US$35,000.
are you going to put your money where your mouth is?
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@Inginsub I'm sure you can get a much cheaper tube that's just as good, except those aren't certified.
You can also buy the 7 year old tubes for a heavily discounted price and those should be good enough with some adjustment.
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@Suiseiseki no, they aren’t good enough after 7 years, and the uncertified ones either didn’t pass the certification or weren’t built to be precise enough in the first place.
you have two options: buy a 35k tube and build an atomic clock, or admit that you’re wrong and shut up
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@Inginsub @Suiseiseki