ss="st">"free"</span>) +<span class="st"> </span>
<span class="st">    </span><span class="kw">geom_line</span>(<span class="kw">aes</span>(thickness, value)) +<span class="st"> </span><span class="kw">labs</span>(<span class="dt">y =</span> <span class="st">""</span>, <span class="dt">x =</span> <span class="st">"thickness /nm"</span>)</code></pre></div>
<p><img src="kretschmannreflectivity/variation-1.png" width="960"></p>
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