Dielectric and Lens

Lens and Dielectric of higher index

Drag the lens into and out of the dielectric interface region and watch the converging lens become diverging. Assumes a value of 1.8 (crown glass) for the lens and 2.0 for the dielectric.

If the dielectric is made to be  +1.4, the lens will remain converging. Try it.

Script Example

<script language="JavaScript">
function dl() {
         document.OpticsBenchApplet.setDefault();
	 document.OpticsBenchApplet.setSize(0.9);
         document.OpticsBenchApplet.setDrag(true);
         document.OpticsBenchApplet.addIndexChange(2.2,1.0);
         document.OpticsBenchApplet.setPropertyDrag(true);
         document.OpticsBenchApplet.addSource(.5,0,.25,-1);
         document.OpticsBenchApplet.addLens(1.5,.5);
}
</script>

Documentation