Everyone at one time or another has marveled at the beautiful red and orange colors of a sunrise or sunset. Air molecules scatter away the shorter wavelengths of light (violet and blue) and the only light which penetrates through the atmosphere are the longer wavelengths of light (yellow, orange and red) which produce colorful sunsets.  Scattering affects the color of light coming from the sky, but the details are determined by the wavelength of the light and the size of the particle. Scattering also explains the colors of the sunrise and sunset, 

In the gallery, sunsets. click image to enlarge and scroll through



University of Wisconsin – Madison. “What Determines Sky’s Colors At Sunrise And Sunset?.” ScienceDaily. ScienceDaily, 15 November 2007. <>.