only 1/40 th
of the sunlight belongs to the blue part of the spectrum.
when
the sunlight travels through the air it is scattered in all directions
by the tiny particles in the atmosphere.
the
blue light travels in shorter waves than the red, the yellow, the green...
the
intensity of the light scattered by a particle is proportional to the inverse
fourth power of the wavelength.
the blue wins. we see the blue. we see 1/40 th