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(B) Optical fibers are made of dielectric materials (glass or plastic) and are electrically non-conductive. Because they do not conduct electricity,th

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Electromagnetic waves interfere with the outer part of the optical fiber.

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(B) Optical fibers are made of dielectric materials (glass or plastic) and are electrically non-conductive. Because they do not conduct electricity,they do not act as antennas and are completely immune to electromagnetic interference $(EMI)$ from external sources. Therefore,the statement that electromagnetic waves interfere with the outer part of the optical fiber is false. Optical fibers have a core with a higher refractive index than the cladding to facilitate total internal reflection,and they are known for extremely low signal attenuation (loss).

Consider telecommunication using optical fibers. Which of the following statements is $NOT$ true?

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