]> 2026-05-16T19:53:48+02:00 LuminousEfficacyOf540THzRadiation 14 en The luminous efficacy of monochromatic radiation of frequency 540 × 10 12 Hz, K cd , is a technical constant that gives an exact numerical relationship between the purely physical characteristics of the radiant power stimulating the human eye (W) and its photobiological response defined by the luminous flux due to the spectral responsivity of a standard observer (lm) at a frequency of 540 × 10 12 hertz. LuminousEfficacyOf540THzRadiation 506f7823-52bc-40cb-be07-b3b1e10cce13 LuminousEfficacyOf540THzRadiation 2023-04-21T06:38:39Z 2460055.7768403 OSW506f782352bc40cbbe07b3b1e10cce13 14 en OSW506f782352bc40cbbe07b3b1e10cce13#LuminousEfficacyOf540THzRadiation;en LuminousEfficacyOf540THzRadiation 14 200 1 plainlist 2 [[HasObject::Category:OSW506f782352bc40cbbe07b3b1e10cce13]] OSW506f782352bc40cbbe07b3b1e10cce13# QUERYda688dad03b2edd46762721665efbf88