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# The attenuation in optical fibre is mainly due to

$\begin {array} {1 1} (a)\;Absorption & \quad (b)\;Scattering \\ (c)\;Neither \: A \: nor\: B & \quad (d)\;Both \: A \: and\: B \end {array}$

A very small part of light energy is lost from an optical fibre due to absorption or due to light leaving the
fibre as a result of scattering of light sideways by impurities in the glass fibre.
Ans : (d)