5. WHY
THE SKY IS BLUE
One mans view.
Just as resonating tuning forks scatter sound,
so do particles in our atmosphere scatter light.
N2 and O2 scatter high frequencies which are
near natural frequencies of N2 and O2.
(Natural frequencies are in the UV.)
This scattering produces the bluish sky.
The blue end of the spectrum is scattered ten
times better that the red end.