Optical signals are forms of communication that use light to transmit information. These signals can be found in various technologies, such as fiber optic cables, which carry data over long distances by sending pulses of light. The light can represent different data types, including voice, video, and internet traffic. In addition to fiber optics, optical signals are also used in devices like lasers and LEDs. These signals are advantageous because they can carry large amounts of data quickly and are less susceptible to interference compared to electrical signals. This makes them ideal for modern communication systems.