Duration 12:7

وحدات القياس (2) المتر وحدة قياس الطول

by أحمد أبوالعلا

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Published 13 Aug 2021

Credit: NIST @https://www.nist.gov/ --------------------------------------------------------------------------------------- :المصادر https://www.nist.gov/si-redefinition/meter https://en.wikipedia.org/wiki/Metre_Convention https://www.bbc.com/travel/article/20180923-how-france-created-the-metric-system https://djabwiss.blogspot.com/2020/12/atomic-clock.html Michelson Interferometer: /watch/scisyhPGST=lennahc_ba&QiTcgEI3u-j3s https://vlab.amrita.edu/?sub=1&brch=189&sim=1106&cnt=1

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