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OpenStudy (anonymous):
why medium of core in optical fiber is not air?
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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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