Quantum Measurement
Holography electron microscope
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According to quantum theory, electrons can have both wave and particle characteristics. Thus, passing electrons through a sample gives rise to interference fringes that can be used to observe the behavior of electric and magnetic fields in the sample. The use of a high-brightness beam of field-emission electrons made it possible for the first time to observe thousands of interference fringes, and made the holography electron microscope a practical instrument.