Answer:
Polycrystalline and amorphous materials with small diameters is the correct answer.
Explanation:
Polycrystalline and amorphous materials with small diameters describes fibers.
Fiber is used to transfer information from one point to another by transmitting light pulses with the help of optical fiber.
In the aspect of length/ diameter ratio, fiber has too low diameter and length is large and also has large strength.
Generally, the length of fibers is quite high and the diameter is very low as compared to length.
It is very beneficial for long-distance conversations because light delivers by the fiber with very low attenuation compared to the electrical wires.
