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Green has the largest spectrum among the colors of the visible spectrum with a difference from shortest to longest wavelength at about 85 nm. If this were assigned a length of 1 cm, you would have to slide 2.1 cm down to enter infrared territory. From there, the infrared spectrum would be 11,755 cm wide (117 meters) before you would slide into microwave territory. The microwave range would be about 11,752,941 cm wide (11.7 kilometers) before sliding into radio waves. The radio wave spectrum would be much, much larger
I think this is incorrect. The angle subtended by a given portion of the spectrum is not linearly correlated with the wavelength. The angle is close to zero for long wavelengths, and rises sharply for very short wavelengths.
This has nothing to do with the refraction portion of what OP asked, I'm answering the second question by arbitrarily assigning a length of one cm to one color's range of the visible spectrum and then applying that arbitrary measure to the rest of the spectrum.