The white light of the sun is not simply white. Anyone can experience this directly with a rainbow, because in this celestial phenomenon the sunlight is split into its spectral colors. As an observer, you look at a rain front with the sun behind you. The light of the sun is reflected in the rain droplets and refracted to varying degrees depending on the wavelength. The arc always forms in a characteristic size, because only these rays of light from the sun, split into their colors, reach our eyes. If you look closely, you can see that there can also be a visible secondary rainbow that reproduces the colors in reverse order.
If you want to know more about this phenomenon, you can find more information about this phenomenon here:
