Answer
This is a hands-on demonstration. Try this with your friends, and be prepared to explain the physics of the demonstration to them.
Work Step by Step
If the reflective surface is nonmetallic, much of the reflected light is polarized. The polarization direction is parallel to the direction of the reflecting surface.
This is discussed on page 556, and diagrammed in Figure 29.33.
You can also confirm that scattered sunlight is polarized.
