Light propagation refers to the behavior of light as it moves through various mediums, such as air, water, or a material. This research area focuses on understanding how light interacts with different substances, how it is absorbed, reflected, or refracted, and how its intensity changes as it travels through these mediums. Research in light propagation is essential in various fields, including optics, telecommunications, and materials science, and can help improve technologies such as optical fibers and imaging systems. Scientists study light propagation to better understand the fundamental properties of light and develop new applications and devices that harness its unique properties.