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Physics 9 Online
OpenStudy (anonymous):

why medium of core in optical fiber is not air?

OpenStudy (anonymous):

it'll have to be a light dense medium(relative to the cladding) for total internal reflection in the fibers to ocur.

OpenStudy (ash2326):

Light should travel in a medium of higher refractive index than the cladding material,. otherwise there won't be Total Internal Reflection. Air has the least refractive index after vacuum

OpenStudy (anonymous):

i think you could have asked why we need cladding in the first place.. why won't just a glass tube (core) do the job?

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