Through what medium do lasers carry information?

• A. Electrical wires
• B. Optical fibers
• C. Sound waves
• D. Radio waves

Answer: (B)

Lasers primarily carry information through optical fibers, which are thin strands of glass or plastic that transmit light signals over long distances. Optical fibers are designed to take advantage of the properties of light, enabling them to carry large amounts of data quickly and efficiently. This is due to the fact that light can carry high-frequency signals, which represent data, with minimal loss of signal over long ranges.

In optical communication systems, a laser generates a light beam that is modulated to encode information, which is then transmitted through the optical fiber. This method offers several advantages such as high bandwidth capacity, immunity to electromagnetic interference, and longer transmission distances without significant signal degradation. Optical fibers have become a standard in telecommunications and data networking because of these characteristics.

Other mediums mentioned would not be effective in the same context. For instance, electrical wires can carry information but are limited by distance and signal degradation. Sound waves are not used for most modern data transmission; instead, they are more applicable in certain specialized applications. Radio waves are used in wireless communication but do not carry the same density of information as light in fibers.