tak ako kazda SI jednotka aj sekunda je definovana jednoznacne.. one scond is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom ..easy :D
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one scond is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom ..easy :D
Inteligentnejší človek by v takomto prípade formuloval otázku inak napríklad ,,definícia jednej sekundy,, hoď to go google a nájde ti tam celkom zaujímavé veci https://www.google.sk/search?q=1+second+definition&oq=1+second+definition+&aqs=chrome..69i57.4656j0j4&client=ms-android-xiaomi&sourceid=chrome-mobile&ie=UTF-8