An inkjet printer uses tiny dots of red, green, and blue ink to produce an image. Assume that the dot separation on the printed page is the same for all colors. At normal viewing distances, the eye does not resolve the individual dots, regardless of color, so that the image has a normal look. The wavelengths for red, green, and blue are λ_red = 660 nm, λ_green = 550 nm, and λ_blue = 470 nm. The diameter of the pupil through which light enters the eye is 2.0 mm. For a viewing distance of 0.6 m, what is the maximum allowable dot separation?