PURPOSE: To demonstrate microwave diffraction be a conducting sphere.

DESCRIPTION: A Van de Graaff generator ground sphere is used as the diffraction center for a beam of 12cm microwaves. The diffracted wave is picked up by a moveable microwave receiver and displayed on the overhead projector microammeter as the receiver is moved around behind the sphere.

SUGGESTIONS:

REFERENCES: (PIRA unknown.)

EQUIPMENT: Microwave transmitter, Van de Graaff ground sphere, and microwave receiver with overhead projector microammeter.

SETUP TIME: 5 min.