Columbia University Physics Lecture Demonstrations


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7A60.50 Bragg diffraction with microwaves - improved apparatus

[Setup Time: 10 Min.] [Current Condition: Good]

Info

X-ray crystallography scaled up to centimeter wavelengths. The microwave source and detector are constrained to the same angle of incidence, which can been easily read off the device. The detector is attached to an audio speaker, through which the detected amplitude can be heard. As the beam angle is varied, or the crystal is rotated, distinct peaks are audible. A cubic crystal is currently available; different structures can be made upon request.

Parts List

Bragg Microwave Cart on Back Wall

Microwave Source and Detector on cart

Large Speaker, Amp, and Audio cables in L. Misc

Relevant Simulation

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Other Information

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Real-Life Examples

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More Advanced Reading

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