I modify the code so that the velocity can be adjust to 20km/s, however, you better to change the time step to smaller value.<br /><br />The unit for change has been change to e (1.6*10^{-19})$<br /><br />The program will change the scale if the particle come out right/left.<br />The bounce off the wall (above/below) kept the same.<br /><br /><br />Click the eye (image) to display the simulation<br />[eye]<p><applet code='users.ntnu.fkh.changeGaussianField4_pkg.changeGaussianField4Applet.class' codebase='ejsuser/2/' archive='ejs_changeGaussianField4.jar' name='changeGaussianField410104' id='changeGaussianField410104' width='531' height='537' mayscript=true><param name='draggable' value='true'></applet></p>/htdocs/ntnujava/ejsuser/2/users/ntnu/fkh/changeGaussianField4_pkg/changeGaussianField4.properties<a href='htmltag.php?code=users.ntnu.fkh.changeGaussianField4_pkg.changeGaussianField4Applet.class&name=changeGaussianField4&muid=2' target='_blank'>Full screen applet</a> or <font color="#FF0000">Problem viewing java?</font><a href="http://www.java.com/en/download/help/jcp_security.xml" target="trusted">Add http://www.phy.ntnu.edu.tw/ to exception site list</a><br><b>Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop.</b> This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/2.5/tw/deed.en">Creative Commons Attribution 2.5 Taiwan License</a><br><a href='ntnujavazip.php?ejsuserjar=10104' title='ejs_changeGaussianField4.jar' target='userjar'>Download EJS jar file</a>(1055.9kB):double click downloaded file to run it. (1 times by 1 users) , <a href='ntnujavazip.php?ejsuserjar=10104&type=ejs' target='userjar'>Download EJS source</a> <a href='/demolab/phpBB/ejswui.php?ejsuser=ejsuser/2/users/ntnu/fkh/changeGaussianField4.ejs' target='ejsxml'>View EJS source</a><img src='images/help.gif' onClick='showejsmsg(10104)'><img src='images/plus.gif' onClick='ejsparser(10104,"changeGaussianField4");'><div id='ejsmsg10104'></div>[/eye]