The impressionist painter georges seurat used a tech- nique called pointillism, in which his paintings are composed of small, closely spaced dots of pure color, each about 2.0 mm in di- ameter. the illusion of the colors blending together smoothly is pro- duced in the eyes of the viewer by diffraction effects. calculate the minimum viewing distance for this effect to work properly. use the wavelength of visible light that requires the greatest distance be- tween dots, so that you are sure the effect will work for all visible wavelengths. assume the pupil of the eye has a diameter of 3.0 mm.