Question

In an optical fibre

• A. Core region is transparent, cladding is opaque.
• B. Core region is opaque, cladding is transparent.
• C. Both core and cladding regions are transparent.
• D. Both core and cladding regions are opaque.

Answer 1

Answer: (C)

Both core and cladding regions are transparent.

The core is that part that the light travels through. so basically it is made of glass or plastic. the cladding is also transparent but it has low refractive index so that outside light does not get into the cable and interfere with the light transmitted. hence In an optical fiber care and cladding regions are transparent but optically denser than air.