SI unit of the brightness of a point light source is: (A) Candela, (B) Lumen, (C) Lux, (D) Lambe
Answer is A. DescriptionQuantity measured nameRecommended unitBrightness of point sourceLuminous intensityCandelaFlow of lightLuminous fluxLumenAmount of light reaching surfaceIllumination IlluminanceLuxAmount of light re-emitted by surfaceBrightness luminanceLambe