Which of the following is a common use for digital waves?

Digital waves are often utilized in the context of optical fibers, which are used for transmitting data over long distances with minimal loss. Optical fibers rely on the principle of total internal reflection, allowing them to carry light signals that represent digital information. This method of data transmission is highly efficient and forms the backbone of modern communication systems, including the internet and telecommunications.

In contrast, the other options pertain to different contexts. Carpets are related to textiles and flooring rather than wave transmission. Sound waves, while they can be analog or digital in nature, do not represent the common usage of digital waves in the same way that optical fibers do, as they primarily transmit sound rather than data directly. Magnetic resonance relates to techniques in imaging and spectroscopy, which do not utilize digital waves in the context of data communication as optical fibers do. Thus, optical fibers are the most appropriate choice for common uses of digital waves.