, 2020). These types of increases in both peak absorption cross section and width of your 450 nm absorption band much more than linearly raise the toughness of the chromophore with concentration. Other chromophores in natural corundum don't clearly show these adjustments and thus show a continuing power with concentration. https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share