The Double Slit Experiment Performed With Electrons @physicsfootnotes6114

Physics Footnotes http://PhysicsFootnotes.com -- Double-slit diffraction is a corner stone of quantum mechanics. It illustrates key features of quantum mechanics: interference and the particle-wave duality of matter. In 1965, Richard Feynman presented a thought experiment to show these features. Here we demonstrate the full realization of his famous thought experiment. By placing a movable mask in front of a double-slit to control the transmission through the individual slits, probability distributions for single- and double-slit arrangements were observed. Also, by recording single electron detection events diffracting through a double-slit, a diffraction pattern was built up from individual events.

This shows the electron buildup pattern one electron at a time. The electron detection rate was about 1 Hz. The first 22 seconds are displayed at the detection rate, the next 30 sec are sped up to 72x, then 20 sec at 210x. The last 20 seconds are slowed back down to the detection rate. The intensity is controlled by a time dependent function to increase visibility of the individual 'blobs' at the beginning.

Roger Bach et al 2013 New J. Phys. 15 033018
http://dx.doi.org/10.1088/1367-2630/15/3/033018
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Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

updated 8 years ago

The Double Slit Experiment Performed With Electrons

Physics Footnotes 2016-07-05 | http://PhysicsFootnotes.com -- Double-slit diffraction is a corner stone of quantum mechanics. It illustrates key features of quantum mechanics: interference and the particle-wave duality of matter. In 1965, Richard Feynman presented a thought experiment to show these features. Here we demonstrate the full realization of his famous thought experiment. By placing a movable mask in front of a double-slit to control the transmission through the individual slits, probability distributions for single- and double-slit arrangements were observed. Also, by recording single electron detection events diffracting through a double-slit, a diffraction pattern was built up from individual events.

This shows the electron buildup pattern one electron at a time. The electron detection rate was about 1 Hz. The first 22 seconds are displayed at the detection rate, the next 30 sec are sped up to 72x, then 20 sec at 210x. The last 20 seconds are slowed back down to the detection rate. The intensity is controlled by a time dependent function to increase visibility of the individual 'blobs' at the beginning.

Roger Bach et al 2013 New J. Phys. 15 033018
http://dx.doi.org/10.1088/1367-2630/15/3/033018
Content from this work may be used under the terms of the

Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

Beautifully Executed Projectile Lab [Best in Full Screen]

Physics Footnotes 2018-10-15 | "My class learning that physics works! 6 groups had to calculate the horizontal and vertical positions of 6 hoops so the launched ball went through all 6 evenly spaced hoops cleanly. All they were given is the launch velocity (which they determined themselves in a previous activity). This was the 1 and only shot they got, there was also a paper clip on the ground that the ball hit after passing the 6th hoop (out of frame though.) WATCH IN FULL SCREEN to track the motion of the ball!" -- Tom Lavanga (Perkiomen Valley High School, PA)

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Bells Last Lecture

Physics Footnotes 2016-08-03 | http://PhysicsFootnotes.com -- John Stewart Bell (best known for is now famous Bell's Inequality) was one of the deepest and clearest thinkers in the history of physics. On 22nd January 1990 Bell delivered an informal colloquium at CERN, Geneva, upon the invitation of the Center for Quantum Philosophy. Just months later, on 1 October of that same year, Bell died unexpectedly of a cerebral hemorrhage, making this his very last lecture.

A Combined Single and Double-Slit Interference Experiment With Electrons

Physics Footnotes 2016-07-05 | http://PhysicsFootnotes.com -- This video is a continuation of the double-slit interference experiment shown in the video: https://youtu.be/ZqS8Jjkk1HI

A mask is moved over a double-slit (inset) and the resulting probability distributions are shown. The mask allows the blocking of one slit, both slits, or neither slit in a non destructive way. The individual slits are 62 nm wide and separated by 272 nm. The mask has a 4.5 μm wide opening. The labeled dimensions are the positions of the center of the mask.

This shows probability distributions for different positions of the mask. The position of the center of the mask with respect to the double slit is shown in the lower right hand corner. The inset shows a depiction of the mask's position over the double slit.

Roger Bach et al 2013 New J. Phys. 15 033018
http://dx.doi.org/10.1088/1367-2630/15/3/033018
Content from this work may be used under the terms of the

Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.