An optical fiber has a single solid dielectric cylinder, known as the core, which is surrounded by a solid dielectric ____. What is it called?

An optical fiber has a single solid dielectric cylinder, known as the core, which is surrounded by a solid dielectric ____. What is it called?

From the BCC Assistant Programmer (CSE) November 2023 – Written exam, question 4 of 54.

More from this paper