A very funny cartoon by Prof. Dr. Claus Grupen of Siegen University:
Author Archives: David Prutchi
diy Measurement of the Charge-to-Mass Ratio of the Electron Using “Magic Eye” Tube – Supplementary Pictures
Figure 54 in the book shows our setup based on a 6AF6-G “magic eye” tuning tube to measure e/m. The pictures in this figure supplement the book’s Figure 54 to help you build your own system. In the 6AF6, electrons produced by a thermionic cathode cause fluorescence on the tube’s anode. Applying an external magnetic field curves the path of the electrons reaching the anode’s fluorescent coating. Knowing R and the voltage applied to the tube allows one to calculate e/m. Continue reading
d.i.y. Two-Channel Single-Photon and Coincidence Counter
This is an inside view of the two-channel photon and coincidence counter of the book‘s Figure 145. It is used in the photon entanglement experiments of Chapter 8. Continue reading
d.i.y. Measurement of Electron’s Charge-to-Mass Ratio Through Hoag’s Method – Supplemental Pictures
Figures 51 and 52 in the book show how to use an oscilloscope 2AP1 CRT to measure e/m using Hoag’s method. The pictures in this figure supplement the book’s, showing you how to construct the d.i.y. setup, as well as the way in which the electron beam fan is reduced to a point as the magnetic field fulfills the focusing equation. In this setup, an AC signal is placed across one set of plates of the CRT to produce a line on the screen. The solenoid is then energized until the line makes one complete helical turn. Continue reading
d.i.y. Maltese Cross Cathode Ray Tube – Supplementary Picture
This is a supplementary picture to the book’s Figure 43. It shows our d.i.y. “Maltese Cross” CRT connected to the vacuum system and high-voltage power supply. Please note that the HV power supply is configured to produce a negative output referenced to ground. The anode and target electrode are at ground potential. The cathode rod inside the glow-discharge electron gun is connected to -HV. Continue reading
d.i.y. Glow Discharge Tube Diagnostics – Supplementary Figure
This figure supplements the book’s Figure 42. The book’s figure describes the features that appear in the glow discharge. However, we felt that a color picture is required as a cross-check to help you correctly set up your own system. Continue reading
X-Band Gunnplexer Microwave Transceiver for Microwave Optics Experiments
This is an inside view of our X-Band Gunnplexer transceiver (book‘s Figure 12) that should help you build your own units if you follow the schematics shown in the book’s Figure 11 . It is used throughout Chapter 1 for experiments in microwave optics, in Chapter 6 to measure single-slit diffraction, and in Chapter 7 to experiment with Quantum Tunneling. Continue reading
MX-10160 Gen III Image Intensifier Tube
This is the surplus Gen III image intensifier tube (an MX-10160 Gen III intensifier tube used in the helmet-mounted AN/AVS-6 “ANVIS” aviation night vision imaging system, which we purchased on eBay®) that we used to build our setup to image interference patterns from our single-photon two-slit setup (book‘s Figure 93). The tube is supplied by 3VDC from two AA cells. We used the same camera to record interference patterns from a single-photon Mach-Zehnder interferometry setup (book‘s Figure 132). Continue reading
Pictorial Instructions for Modifying ENI CD V700 into CDV700 Pro
We modified a surplus Civil Defense V-700 radiation survey meter made by Electro Neutronics Inc. (Model 6-b) into a very capable radiation counter capable of working with both Geiger-Müller and PMT scintillation probes. We modified the front panel to accommodate the new switches, connectors, and panel light. In addition, we placed a Veeder-Root count totalizer module on the side of the box. The new electronic components, including a Zener diode stack and a PMT preamplifier are wired directly to the original printed circuit board. Continue reading
Welcome to diyPhysics.com !
Welcome to diyPhysics.com, a blog dedicated to the advanced do-it-yourselfer interested in modern and quantum physics!
We are the authors of the book “Exploring Quantum Physics through Hands-On Projects,” which will help you understand Quantum Physics through hands-on experiments that you can conduct at school or at home!
Our book will guide you in the construction and use of setups to reproduce the key experiments that have brought us to our current understanding of the quantum world. Importantly, all of the experimental equipment can be built out of relatively inexpensive materials that are readily available at the hardware store or from on-line vendors of electronic surplus.
The projects range from simple measurements of Planck’s constant all the way to testing violations of Bell’s inequalities using entangled photons. The project descriptions are targeted to an audience with basic experience in electronic prototype construction. The circuits actually work, and the schematics are completely readable.
We hope that you enjoy reading our blog!
David and Shanni Prutchi
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Modern/Quantum Physics Instructors: Adopt the Textbook
Teachers, instructors, and professors at accredited higher-learning institutions may request an evaluation copy of the book from J. Wiley & Sons.
Why should you adopt this book as your Quantum Physics lab course textbook?
Our book explains Quantum Physics through hands-on experiments that the reader can perform at school. Throughout the book we guide the reader in the construction and use of setups to reproduce the key experiments that have brought us to our current understanding of the quantum world. Importantly, all of the experimental equipment can be built by the reader out of relatively inexpensive materials that are readily available at the hardware store or from on-line vendors of electronic surplus. Continue reading