Mach bands [SEP] named after
Mach bands
Mach bands is an optical illusion named after the physicist Ernst Mach. It exaggerates the contrast between edges of the slightly differing shades of gray, as soon as they contact one another, by triggering edge-detection in the human visual system. 
Explanation.
The Mach bands effect is due to the spatial high-boost filtering performed by the human visual system on the luminance channel of the image captured by the retina. Mach reported the effect in 1865, conjecturing that filtering is performed in the retina itself
. Because she publicly questioned the tenets of a powerful pantheon of artists that included Judd and Morris, Baer was ostracized by a number of her former colleagues.
Among Baer's most ambitious essays, for she which was able to employ her scientific training, was "Art & Vision: Mach Bands," published in 1970. She tackled the physics and psychology of visual perception in her discussion of Mach bands, an optical illusion named after Ernest Mach, a nineteenth-century physicist who discovered that light-dark contrasts will