-CANDELA-[THE UNIT]

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-as of [29 SEPTEMBER 2024]

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*SYMBOL* —>

-CD-

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-[CANDELA] REFERENCES-

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*FREQUENCY* —>

-[540 × 1012] Hz-

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-DEFINE THE “LUMINOUS EFFICACY” OF RADIATION WITH THIS FREQUENCY AS “683”-

-THE UNIT IS [[LUMENS] / [WATT]]-

(LM / W)

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-THE [LUMEN]-

-[CANDELA] x [2π]-

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-THE [STERADIAN]-

[2π]

(6.28)

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*full circle* —>

(360°)

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*half circle* —>

(180°)

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-THE [WATT]-

(joules / second)

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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

ΔνCs

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(the ‘candela’ is the ‘SI base unit’ of ‘luminous intensity’…)

(….that is, ‘power’ emitted by a ‘light source’ in a particular direction)

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(weighted by the ‘luminosity function’…) 

(…a standardized model of the ‘sensitivity’ of the ‘human eye’ to different ‘wavelengths’)

*aka the luminous efficiency function*

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*a ‘common candle’ emits ‘light’ with a ‘luminous intensity’ of ~ 1 candela*

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(if ’emission’ in some ‘directions’ is blocked by an ‘opaque barrier’, the emission would still be approximately one candela in the directions that are not obscured)

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*the word candela means candle in [‘latin’ / ‘spanish’ / ‘italian’]*

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*👨‍🔬🕵️‍♀️🙇‍♀️*SKETCHES*🙇‍♂️👩‍🔬🕵️‍♂️*

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📚📖|/\-*WIKI-LINK*-/\|📖📚

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👈👈👈☜*“SIGHT”* ☞ 👉👉👉

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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘

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*🌈✨ *TABLE OF CONTENTS* ✨🌷*

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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥