Candela of a single point light source of intensity "I", at a distance "r" and normally incident, this reduces to Candela The candela ( or ; symbol: cd) is the base unit of luminous intensity in the International System of Units (SI); that is, luminous power per unit solid angle emitted by a point light source in a particular direction. Luminous intensity is analogous to radiant intensity, but instead of simply adding up the contributions of every wavelength of light in the source's spectrum, the contribution of each wavelength is weighted by the standard luminosity function (a model of the sensitivity
What Difference Does It Make? What Difference Does It Make? "What Difference Does It Make?" is a song by the English rock band the Smiths, written by singer Morrissey and guitarist Johnny Marr. It was the band's third single and is featured on their debut album, "The Smiths". A different version, recorded for the John Peel Show on BBC Radio 1, is included in the compilation album "Hatful of Hollow". The song was one of the band's first significant chart hits, peaking at No. 12 in the UK Singles Chart. However, Morrissey has said "What Difference Does It Make?" is among his least favourite songs