Converging+and+Diverging+Lens+ray+diagrams.

SUMMARY OF THE APPLET
This applet helps us view the image of an object is responding to the changes of its distance to the lens, its height and the type of lens (converging or diverging).

**HOW TO USE JAVA APPLETS**

 * 1) Press toggle button to change between **converging/diverging** lens
 * 2) Move the object
 * 3) Click near tip of the object, and drag it to where you like it and release the mouse button.
 * 4) Move the lens/mirror:
 * 5) Click near center of the lens, and drag it to left or right. if click with left mouse button, only lens will move. if click with right mouse button, object will move with lens.
 * 6) Change the focus length of the lens/mirror
 * 7) Click near the top/bottom of the lens/mirrir, then drag the mouse . Try it!
 * 8) If you adjust the size of window, parameters reset to default values.

=**Who Created Applets**=

The principal consultant of Sherman Visual Lab is **Dr. Sherman** (Xing M., or Xing-min) **Wang (汪醒民)**. Sherman has a PhD in Theoretical Physics from University of Delaware. He has published [|14 research papers on Particle and Fields] in various, refereed journals. Sherman has 9-years teaching experience with 5 years in the U.S., at Muskingum College, OH and 4 years in China, at Hangzhou University, Hangzhou (now a part of Zhejiang University). He has taught physics at all college levels as well as some mathematics. His favorite course to teach was Quantum Mechanics.