WLightWAcousto-opticsWArs Magna Lucis et UmbraeWColor mixingWDaylightWDaylight factorWDiffuse sky radiationWFresnel equationsWFresnel rhombWAugustin-Jean FresnelWGenesis 1:3WGenesis 1:4WGenesis 1:5WHyper–Rayleigh scatteringWIlluminant D65WLet there be lightWLight beamWLight coneWLight-in-flight imagingWLight-yearWLuminous flameWMatthew 5:14WMatthew 5:15–16WMinimum deviationWMoonlightWNūr (Islam)WPhotodegradationWPhotogramWPhoton upconversionWLight pillarWPlane of polarizationWRadiative transfer equation and diffusion theory for photon transport in biological tissueWRayleigh scatteringWRight to lightWRømer's determination of the speed of lightWSalt and lightWShade (shadow)WShadow bandsWA Slower Speed of LightWSpeed of lightWSqueezed states of lightWStandard illuminantWSynchrotron light sourceWTired lightWTotal internal reflectionWVisible light communicationWWeighting filterWLight of the World
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