Optical fibers are the best medium of transmission over copper wires, because

Options

A. The loss of data in optical fibers is very-very high
B. optical fiber is cheap and easy to construct
C. The optical fibers are made of glass and they are automatically isolated from the current
D. The optical fibers can take few number of telephonic message at a time.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks why optical fibers are considered a better medium for transmission compared to copper wires.

2. **Analyzing the Options**:
- **Option A**: Claims that the loss of data in optical fibers is very high. This is incorrect because optical fibers are known for low data loss.
- **Option B**: States that optical fibers are cheap. This is also incorrect; optical fibers are generally more expensive to manufacture and install compared to copper wires.
- **Option C**: States that optical fibers are made of glass and are insulated from current. This is true. Glass is a good insulator, which prevents electrical interference.
- **Option D**: Claims that optical fibers can take only a few telephonic messages at a time. This is false; optical fibers can carry a large number of signals simultaneously due to their high bandwidth.

3. **Conclusion**: The best reason why optical fibers are superior to copper wires is given in Option C, which highlights their material properties and insulation from electrical interference.

4. **Final Answer**: Optical fibers are the best medium of transmission over copper wires because they are made of glass, which is a good insulator and allows for total internal reflection, minimizing data loss and allowing for high bandwidth.

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