👉 Phototelephone is a type of telephone that operates using light. It uses a lens to focus the incoming light onto a screen or device, allowing for easier communication and navigation on land and in the air. This technology has been used since ancient times, but it was not widely available until the 20th century when the first phototelephone devices were invented. Today, phototelephones are commonly used to communicate with people using a variety of technologies such as cell phones, Wi
