<div dir="ltr"><div><span class="" style="font-size:16px;background-color:rgb(245,245,245)"><span style="font-size:12.8px;background-color:rgb(255,255,255)">Dear Wien Users ,</span><br class="">how to determine</span><span style="font-size:16px;background-color:rgb(245,245,245)"> </span><span class="" style="font-size:16px;background-color:rgb(245,245,245)">optical gap</span><span style="font-size:16px;background-color:rgb(245,245,245)"> </span><span class="" style="font-size:16px;background-color:rgb(245,245,245)">from</span><span style="font-size:16px;background-color:rgb(245,245,245)"> </span><span class="" style="font-size:16px;background-color:rgb(245,245,245)">the graph of </span><span style="font-size:16px;background-color:rgb(245,245,245)"> </span><span class="" style="font-size:16px;background-color:rgb(245,245,245)">optical</span><span style="font-size:16px;background-color:rgb(245,245,245)"> </span><span class="" style="font-size:16px;background-color:rgb(245,245,245)">properties</span><span style="font-size:16px;background-color:rgb(245,245,245)"> ? is determine from the graph of </span><span style="font-size:16px">absorption coefficient? and how ?</span><span style="font-size:12.8px"><br></span></div></div><div class="gmail_extra"><br><div class="gmail_quote">2016-03-02 12:32 GMT+01:00 said chibani <span dir="ltr"><<a href="mailto:chibanisaid102@gmail.com" target="_blank">chibanisaid102@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Dear Wien Users ,<div>how to interpret the graphs of the optical properties   ( The imaginary part of the complex dielectric and real part , the reflectivity R( w ),the refractive index n( w ),the absorption coefficients, the electron energy-loss function L( w )).</div><div><p dir="ltr" style="font-size:12.8px">Please, could you help me?</p><p dir="ltr" style="font-size:12.8px">Best wishes.</p></div></div>
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