So blue light traveling through the sky scatters down towards us and the sky looks blue. Red light travel through, so sunsets look red.
Light is the oscillations in the electric field.
Wiggles are a combination of side to side motion and up and down motion. So light is polarizaed transvers to the direction of the sun. Polarization due to Brewster effect. When transmitted ray is at 90 degrees to reflected ray, all radiation is transmitted. This happens for incident angle of about 56 degrees.