optics.gif (6954 bytes)

TOTAL INTERNAL REFLECTION
Colored Water Fountain






EQUIPMENT
    redball.gif (326 bytes) Black Water Tank
    redball.gif (326 bytes) Light Source
 


NARRATIVE
            This demonstrates Total Internal Reflection in a curved Fountain of Water.   Fill the tank with clear water; by moving the light source, adjust for maximum transmission through the tank. Dim the room lights. Remove the rubber plug from the tank. The stream of water forms a "light pipe". Insert a colored glass plate between the light source and the tank to produce a colored fountain.