Light transmission refers to the process by which light passes through a material. Different materials can affect how much light is transmitted, absorbed, or reflected. For example, clear glass allows most light to pass through, while opaque objects, like bricks, block light completely. This property is essential in various applications, such as in windows that let sunlight into buildings. The ability of a material to transmit light is measured by its transparency. Water is another example, as it transmits light well, allowing us to see underwater. Understanding light transmission helps in designing better lighting systems and improving optical devices like lenses and cameras.