How do polarized lenses work?

Many people find that polarized sunglasses help them to see better outdoors. Even indoors, some people prefer to have polarized lenses in their glasses. How do these lenses work?

In general, light reflects from a surface in all directions. Rather than being lined up, the light waves are at all different orientations. However, when light reflects off a flat surface, the light waves will tend to be lined up in a more uniform direction. This is usually a horizontal...Read More