What is the fixed value of the luminous efficacy used to define the candela? - Some Basic Concepts of Chemistry Quiz | GKFix.in

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Question

What is the fixed value of the luminous efficacy used to define the candela?

A. 682 lm·W⁻¹
B. 684 lm·W⁻¹
C. 683 lm·W⁻¹
D. 1 lm·W⁻¹

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