Passive polarization refers to the natural alignment of light waves as they reflect off surfaces or pass through certain materials. This phenomenon occurs when light interacts with a medium, causing the waves to oscillate in a specific direction. In everyday life, passive polarization can be observed when wearing polarized sunglasses, which filter out glare from surfaces like water or roads. The lenses are designed to block horizontally polarized light, enhancing visibility and reducing eye strain, making activities like driving or fishing more comfortable.