optics.gif (6954 bytes)

GMEINDL-DUFF APPARATUS








EQUIPMENT
    redball.gif (326 bytes) Gmeindl-Duff Apparatus
   



NARRATIVE
            This demonstration shows light through cellophane tape mounted on several glass slides at different angles through Polaroid filters.

            The box has three switches:

                    redball.gif (326 bytes)  Power On/Off Switch

                    redball.gif (326 bytes)  Start/Stop Switch for Polaroid Filters

                    redball.gif (326 bytes)  Start/Stop Switch for the cellophane slide rotator