The light is brightest when the blue electric force arrow is biggest, and it is dark where it is zero. It still seems strange to think about a force field that moves in a different direction than the light, but I guess light is just one example of the electromagnetic waves we talked about earlier. You're exactly right, Kyla. That and most light is NOT polarized, although the electric forces still move up and down perpendicular to the ray direction. In the picture above, the light is polarized in the plane of the yellow arrow.
Unpolarized light looks more like the movie below.
It looks like the yellow arrow plane keeps jumping to a different angle, even though the ray direction remains the same. That's right, but notice that no matter how the yellow arrow twists, the electric forces are always perpendicular to the ray direction. In unpolarized light the twist of the yellow arrow plane keeps changing randomly. We will use the picture below on the left as a symbol for polarized light, and the picture on the right as a symbol for unpolarized light. That's a good question, Kyla.