A. Bimetallic
B. Copper
C. Glass or plastic
D. Steel
🧠 Explanation:
The inner core of an optical fiber is made of glass or plastic, transmitting light signals efficiently. This technology is a key topic in physics and telecommunications, engaging students and engineers. Understanding optical fibers clarifies their role in high-speed internet, relevant for studying digital communication. Their composition attracts those exploring tech innovations, highlighting their impact on global connectivity, emphasizing their importance in modern internet and data transfer systems.
