Why Sunrises and Sunsets look red

I love taking photos of sunsets and sunrises, especially when putting it on a setting so that the red really shows nicely. It is also pretty cool to see how as the sun sets it almost makes a faded rainbow of colors in the sky, going from red to blue, to black. It doesn't always happen, but when it does it is spectacular.

The reason the light at sunrise or sunset does this is because of the dust and air particles in the earth's atmosphere. These particles reflect light and disperse it into the atmosphere, that is why the sky is blue. The particles separate the blue light from the white light and disperses it into the atmosphere. At sun rise or sunset, the white light has to travel through a lot more particles than at noon day, so the light gets dispersed a lot more until it gets to red in the color spectrum. That is why sunsets and sunrises are red and orange and when the conditions are right the sky looks like a faded rainbow.