Electron diffraction tube
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Electron diffraction tube
Electron diffraction tube. Demonstration of wave-particle duality. An electron gun is fired at a thin sheet of graphite. The electrons pass through and hit a luminescent screen, producing the patterns of rings associated with diffraction. Diffraction occurs when a wave passes through an aperture similar in size to its wavelength. But electrons are particles, so should not exhibit the same phenomenon unless they can also behave like waves. De Broglie (1892-1987) correctly deduced that this was the case and that particles have wavelengths inversely proportional to their momentum
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Media ID 6438057
© ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY
Apparatus Diffracting Diffraction Pattern Quantum Mechanics Ring Rings Physical
EDITORS COMMENTS
This print showcases an Electron diffraction tube, serving as a remarkable demonstration of wave-particle duality. The image captures the moment when an electron gun releases electrons towards a delicate sheet of graphite. As these particles traverse through the sheet, they encounter a luminescent screen, resulting in mesmerizing patterns of rings that are synonymous with diffraction. Diffraction is typically observed when waves pass through an aperture similar in size to their wavelength. However, electrons are traditionally considered as particles and not expected to exhibit such behavior unless they possess wave-like characteristics. This intriguing phenomenon was correctly deduced by De Broglie (1892-1987), who postulated that all particles possess wavelengths inversely proportional to their momentum. The apparatus featured in this photograph represents a pivotal milestone in quantum mechanics and serves as tangible evidence supporting De Broglie's hypothesis. It highlights the profound connection between matter and energy, challenging our conventional understanding of particle physics. With its intricate diffraction patterns and thought-provoking implications, this image encapsulates the essence of modern physics research. It reminds us that even at microscopic scales, nature continues to surprise us with its inherent complexity and uncanny ability to blur the lines between classical concepts like waves and particles.
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