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Polarization of Microwaves (T 13)


Demonstration Description:
A microwave transmitter emits a 10 GHz polarized signal modulated by a 1000 Hz square wave. A receiver, connected to an audio speaker to make the received signal audible, faces the transmitter. A metallic grid, consisting of thin and closely spaced parallel bars, is held between them at various orientations. When the bars are held parallel to the E-field, the signal is blocked. When the bars are rotated 90o , however, the signal is uninterrupted. A solid metallic sheet attenuates the waves. The output can also be displayed on an oscilloscope


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