PURPOSE: To demonstrate refraction.

DESCRIPTION: The rod, inserted into the water tank and viewed from an angle, shows a discontinuity at the surface of the water. Insert the other end of the rod at an angle into the water; the rod looks bent when viewed at an angle.

SUGGESTIONS: See Question of the Week #288 for information on using this demonstration to enhance class involvement.

REFERENCES: (PIRA 6A42.45)

EQUIPMENT: Plastic water tank with mounted stick.

SETUP TIME: None.