I really like to paint, blue is my favorite color. 
Clear blue skies are my favorite, and are caused by the Rayleigh scattering effect.
Oh wow that's really interesting. Is that named after the person who discovered it first?
Rayleigh scattering
Rayleigh scattering ( ), named after the nineteenth-century British physicist Lord Rayleigh (John William Strutt), is the predominantly elastic scattering of light or other electromagnetic radiation by particles much smaller than the wavelength of the radiation. For light frequencies well below the resonance frequency of the scattering particle (normal dispersion regime), the amount of scattering is inversely proportional to the fourth power of the wavelength.
Rayleigh scattering results from the electric polarizability of the particles. The oscillating electric field of a light wave acts
Rayleigh scattering, it contributes to the blue color of the sky, and is noticeable when the light has to travel a long path through the atmosphere. For this reason, Chappuis absorption only has a significant effect on the color of the sky at dusk, during the so-called blue hour. It is named after the French chemist James Chappuis (1854–1934), who discovered this effect.
History.
James Chappuis was the first researcher (in 1880) to notice that light passing through ozone gas has a blue