Atmospheric scattering    


Atmospheric scattering is the effect that distant objects become more blueish and lose contrast. It is caused by particles in the sky between the object and the observer scattering light and it is especially visible on hazy days with the sun high up in the sky. The fact that the distant objects turn blueish is because blue light is scattered most efficient.









The forest in the back is covered with a blue haze. (2013-09-21)


The iconic Herðubreið mountain in Iceland turning blue. (2015-09-25)