Talk:"Greatest Show On Earth"/@comment-222.121.47.13-20140426095643/@comment-109.91.49.215-20140426102445

The sky is blue because light consists of many different colours that you can see in a rainbow. All light colours have different wavelenghts therefore can "travel" on a certain distance. Blue light has the longest wavelengths of all colours therefore can travel the farthest. Now when light comes from the sun it gets filtered by our atmosphere but leaves out the light with the light with the longest wavelenghts and that's why the sky is blue. There is also the theory that the atmosphere mirrors the ocean but i dont believe that. I hopw that answered your question.