Subject: Wow!!! Date: Sun, 03 May 1998 12:47:55 -0600 From: The Lahrs To: hwang@phy03.phy.ntnu.edu.tw I love your thin lens page: http://www.phy.nau.edu/~layton/JavaApps/thinlens/lens_e.htm What a great use of Java! I use Netscape, by the way, and the applet worked just fine and was very speedy. I've been trying to figure out why a glass rod creates an inverted (about one axis) virtual image. Do you have an applet for a thick lens, or just a ray diagram that would show this effect? Is the thinlens.java code still available? The link was not working when I tried. It would be interesting to develop something like this for seismic waves. I'm a seismologist now, but my first love is physics, which was my undergraduate major at Rensselaer Polytechnic Institute. Thanks again for providing the world this great applet. John C. Lahr -- * John C. and Jan H. Lahr * * 914 10th Street * * Golden, Colorado 80401 * * (303) 215-9913 * * http://www.lahr.org/john-jan * * http://giseis.alaska.edu/lahr *