Radiowaves - Standing Waves
To demonstrate standing waves using radio waves.
Radio wave transmitter with dipole antenna receiver and flashlight bulb indicator.
Turning off most of the lights aids visibility.
Set transmitter so that the antenna is parallel to the blackboard. (The blackboard is made of a painted metal sheet.) Hold the receiving antenna parallel to the transmitting antenna between you and the transmitter, and walk up the steps in the lecture hall. The bulb will produce maximum glow about every two meters, illustrating standing waves.◙
Operating Instructions, Short Wave Radio Demonstration Apparatus, Cenco No. 080435, Cenco Scientific Co., Chicago, IL. Richard M. Sutton, Demopnstration Experiments in Physics, A34-39, 853-859. ◙Lecture Demonstrations Photographs of Demonstrations in Use.