What is meant by plankian locus? What is its importance?
The Planckian locus is the curved line on a chromaticity diagram that represents the colors of Planckian, or blackbody, radiators. As a blackbody radiator is increased in color temperature, its color changes from red, through yellow, to blue and the Planckain locus maps out this change. These color temperatures are also used as descriptors of the colors of other types of light sources. I’d suggest you read about blackbody (Planckian) radiators, color temperature, and correlated color temperature in a text on colorimetry such as Berns’ “Principles of Color Technology, 3rd Ed.
