Proposed measuring the meter as so many wavelengths of light of a certain frequency, the kind of definition employed from 1960 to 1983 and since 2019
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Proposed measuring the meter as so many wavelengths of light of a certain frequency, the kind of definition employed from 1960 to 1983 and since 2019
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-17 from Wikipedia. The archived copy is preserved so this citation survives link rot.