Add equation image to short_dipole

short_dipole.html

@@ -55,6 +55,8 @@
                 </ul>
             </u>
             <br>
+            <b>Equation used:</b><br>
+            <img src="L_short_dipole_sml.png" alt="off-center loaded dipole" width="600" height="100"><br><br>
             </div>
         </section>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjs/7.5.1/math.min.js"></script>