In an optical fiber, the inner core is _______ the cladding.

In an optical fiber, the inner core is _______ the cladding.

• the same density as
• also known as
• less dense than
• denser than 

EXPLANATION

 

An optical fiber has two layers, the inner layer and the outer layer. The inner layer is called core. The data pass through a core. This core is made of dense of glass or plastic. The outer layer of a fiber is called cladding. It is also made of glass or plastic. Its glass or plastic is less dense.
Cladding is used in optical fiber for prevent any refraction while passing data. The function of cladding is to occur full internal reflection in optical fiber. That is why a cladding’s density is lower then core.

The inner core of an optical fiber is Glass or plastic