Answer : 2. "नरिन्दर कपानी"
Explanation :

Dr. Narinder Singh Kapany is often credited with the invention of optical fiber. In the early 1950s, Kapany conducted pioneering research in the field of fiber optics, leading to the development of the first practical optical fibers. Optical fibers are thin strands of glass or other transparent materials that can transmit light signals over long distances with minimal loss of signal quality.

Narinder Kapany's work laid the foundation for the use of optical fibers in telecommunications, enabling the high-speed transmission of information through the transmission of light signals. His contributions to the field of fiber optics have had a profound impact on modern communication systems, including the development of fiber-optic communication networks.