Question

9. Optical fibers are made from
(a) fine sand
fo) purified natural quartz
(c) dry ice and sand
(d) polyethene​

Answer 1

Answer:

purified natural quartz is your answer

Answer 2

Explanation:

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➡️A glass optical fibres is a flexible , transparent fibre made by drawing glass. it consists of a core surrounded by a cladding layer... since the diameter of thin glass fibre is about a half of the typical human hair l, fibre cores are made from very high purity optical glass material.

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