Yes, it is possible to travel in complete darkness without any visible light source. Darkness refers to the absence of visible light, and our eyes rely on detecting light to perceive our surroundings. However, there are other ways to navigate and sense one's environment without relying on visible light.
For example, certain animals, such as bats and dolphins, use echolocation to navigate and locate objects in the dark. They emit sounds or clicks and listen for the echoes that bounce back off objects, allowing them to build a mental map of their surroundings.
Infrared (IR) technology is another method used for navigating in darkness. Infrared light is outside the range of human vision, but it can be detected and interpreted by specialized devices, such as thermal cameras or night vision goggles. These devices can capture and convert the infrared radiation emitted by objects into visible images, enabling individuals to see their surroundings even in the absence of visible light.
Furthermore, other senses, such as touch, hearing, and spatial awareness, can also be used to navigate and interact with the environment in the absence of visible light. While it may be challenging and disorienting for humans who primarily rely on vision, it is still possible to travel and function in complete darkness by utilizing alternative methods of perception and navigation.