What does it mean to polarize light?

To polarize light means to restrict the vibrations of light waves to a specific direction or plane. Normally, light waves vibrate in multiple directions, but when light is polarized, it oscillates predominantly in one direction. This can be achieved through various methods, such as reflection, refraction, or using polarizing filters. Polarized light has various applications, including reducing glare in sunglasses and enhancing contrast in Photography.