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<a accesskey="3" href="page.php?w=Optoelectronics&amp;p=2">3.Next</a>
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<p><b>Optoelectronics</b> (or <b>optronics</b>) is the study and application of <a href="page.php?w=electronics">electronic</a> devices and systems that find, detect and control <a href="page.php?w=light">light</a>, usually considered a sub-field of <a href="page.php?w=photonics">photonics</a>.  In this context, light often includes invisible forms of radiation such as <a href="page.php?w=gamma_ray">gamma ray</a>s, <a href="page.php?w=X-ray">X-ray</a>s, <a href="page.php?w=ultraviolet">ultraviolet</a> and <a href="page.php?w=infrared">infrared</a>,</p><p>
<a accesskey="3" href="page.php?w=Optoelectronics&amp;p=2">3.Next</a>
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