How is it possible for a fibre optics cable to carry many different signals at one time without signals becoming scrambled?

Fiber optic cables can carry multiple signals simultaneously through a technique called wavelength division multiplexing (WDM). This method involves using different wavelengths (or colors) of light to encode separate signals, allowing them to travel along the same fiber without interference. The light signals are precisely managed and separated by their wavelengths, ensuring that they remain distinct and do not scramble. Additionally, the high bandwidth and low attenuation of fiber optics contribute to maintaining signal integrity over long distances.