Polarization of light teaches us that light waves can oscillate in more than one direction. When light is polarized, it oscillates in only one direction, which can be used in various applications such as reducing glare in sunglasses and in 3D movie technology. The concept of light as waves helps us understand phenomena like interference and diffraction. It explains how light can bend around corners and create patterns when it passes through certain objects, which is fundamental in the field of optics. Maxwell's Equations provide a comprehensive mathematical description of how electric and magnetic fields interact. They predict the existence of electromagnetic waves, which include light waves, and their speed, which is the speed of light. This forms the basis of our understanding of light and other electromagnetic phenomena