When the sun begins to set, the light must travel farther through the atmosphere before it gets to our vision. As less light only reaches us directly, more of the light is reflected and scattered, the sun appears less bright to us. The blue wavelengths are scattered much earlier on, away from our sight, while the red wavelengths are left to propagate through the atmosphere and into our eyes. Thus, the color of the sun appears to change to orange and later to red. During sunset, the sky around sun may take on many different colors. The sky is more spectacular when the air contains many small dust or water particles, which reflect light in all directions. So, the sunset becomes red when the air is polluted by dust particles. Sunsets over the sea appears orange in color due to the salt particles in the air, which are effective Tyndall scatterers. Thus the sky around the sun is seen reddened, as well as the light coming directly from the sun appears in yellow, red and orange colors.