Light waves are a type of electromagnetic radiation that can be seen by the human eye. They travel in straight lines and can move through various mediums, such as air, water, and glass. Light waves have different wavelengths, which determine their color; for example, red light has a longer wavelength than blue light. These waves exhibit both wave-like and particle-like properties, a concept known as wave-particle duality. Light waves can reflect off surfaces, refract when passing through different materials, and interfere with one another. This behavior is essential for many technologies, including lenses, cameras, and fiber optics.