(used to define the SI base unit ‘candela’)
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*the ‘candela’ […] is defined by taking the ‘fixed numerical value’ of the ‘luminous efficacy’ of ‘mono-chromatic radiation’ of frequency 540 × 1012 Hz, Kcd, to be 683 when expressed in the unit lm W–1,
which is equal to cd sr W–1,
or cd sr kg–1 m–2 s3, where the kilogram, metre and second are defined in terms of h, c and ΔνCs.
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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👈👈👈☜*“THE 7 SI CONSTANTS”* ☞ 👉👉👉
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥