An attempt to understand myself, nature, and the world at large.
20 May 2007
Link of the day: Why isn't the sky purple?
Phillip Johnson at Biocurious makes a good point. We learn in undergraduate physics that the color of the sky is due to Rayleigh scattering which depends inversely on the wave length to the fourth power. If that is so, wh isn't the sky purple? You can view the discussion here.