Optics is the branch of physics that investigates the light itself. It searches the answers to the questions like “How does the light behave in different mediums?” or “What can we use the light for?”.

Optical fibers are used to transmit information in the form of light signals over long distances with very little loss of signal strength, making them a preferred choice for telecommunications networks, internet connections, and cable television. They are also used in medical equipment, military communication, and scientific research. Compared to traditional copper cables, fiber optic cables can transmit much more data over longer distances and are more resistant to interference from electromagnetic fields.