This applet demonstrates lens combination. It has both concave and convex lenses. The user can move the lenses around on the optical bench and when they switch on the light, they can see how the rays trace through the lenses. By dragging the lenses, users can also observe how the location of the intersection point and with it the focal length changes.
%0 Electronic Source %A Bauer, Wolfgang %D March 10, 2004 %T Applet: Lens Combination %V 2017 %N 21 January 2017 %8 March 10, 2004 %9 application/java %U http://www.lon-capa.org/~mmp/applist/optics/o.htm
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