Whether you need HPLC tetrahydrofuran, ACS tetrahydrofuran, Anhydrous tetrahydrofuran or one of our many other grades, we stock the right product for your application. As a leading supplier of high-purity, research grade solvents, we have the THF to meet your exact needs. Acetone.
The âHuman White Balanceâ in the Brain. Human visual perception does not work like a technical measuring instrument that projects signals from the eyes on some kind of âmonitorâ in the brain. The pictures we perceive are created in the brain and after the brain has compared the signals from the eyes with known patterns and colors.
White is the color the human visual system senses when the incoming light to the eye stimulates all three types of color sensitive cone cells in the eye in nearly equal amounts. Materials that do not emit light themselves appear white if their surfaces reflect back most of the light that strikes them in a diffuse way.