How light carries the internet

Light stays trapped inside the fiber core by constantly reflecting off the cladding walls.

Data travels in specific windows like 1550 nm where glass is most transparent to light.

Attenuation is the gradual loss of signal strength as light travels through the fiber.

Submarine cables span over 6,000 kilometres, carrying 95 percent of all intercontinental internet traffic.

Wavelength division multiplexing allows multiple data streams to travel simultaneously through one single fiber.