Initialize Mirror with Spherical Aberration

You can click-drag both the source and the mirror.  You can also clink-drag on the focal length and the source angle if you make the lens or the source the active element first by clicking on these objects.

The small angle approximation used in the mirror equation does not produce spherical aberration.  Try it.

Script Example

<script language="JavaScript">

function mirror() {
         document.OpticsBenchApplet.setDefault();
         document.OpticsBenchApplet.setSize(0.9);
         document.OpticsBenchApplet.setDrag(true);
         document.OpticsBenchApplet.setPropertyDrag(true);
         document.OpticsBenchApplet.setInfo(true);
         document.OpticsBenchApplet.addSphericalMirror(4.2,0.8);
         document.OpticsBenchApplet.addSource(1.4,-0.35,.05,-0.20);
}
</script>

Documentation