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<p>signals.</p>

<p><big> In waveguides </big></p>
<p>The backscattering method is also employed in <a href="page.php?w=fiber_optics">fiber optics</a> applications to detect optical faults. Light propagating through a <a href="page.php?w=fiber-optic_cable">fiber-optic cable</a> gradually attenuates due to <a href="page.php?w=Rayleigh_scattering">Rayleigh scattering</a>. Faults are thus detected by monitoring the variation of part of the Rayleigh backscattered light. Since the backscattered light <a href="page.php?w=attenuation_%28electromagnetic_radiation%29">attenuates</a></p><p>
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