For some of my class lectures, I wanted to improve on the images that I’ve been using to illustrate the different uses for optical polarization in the world. One very simple application is to use a linear polarizer to remove reflection glare, from a water surface or from a pane of glass. For a smooth material surface in air, the Brewster angle of incidence (53° for water, 56° for normal glass) is where all of the p-polarized light will enter the material, so that reflected light will be 100% s-polarized. Therefore, if we use a linear polarizer, rotated so that it only passes p-polarization, we can cancel the reflection glare.
Below is a set of image pairs showing the same scene with and without a polarizer in place to reduce reflection glare — off of windows or a water surface. After the images I also have a couple of videos showing a scene while I manually rotate a polarizer in front of the camera. This allows us to see, in live mode, the effect of the reflection glare removal.