Person: Rueckner, Wolfgang
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Rueckner
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Wolfgang
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Rueckner, Wolfgang
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Publication The puzzle of the steady-state rotation of a reverse sprinkler(American Association of Physics Teachers (AAPT), 2015) Rueckner, WolfgangThe continuous rotation of the reverse sprinkler has been a puzzle for over two decades. This article presents a series of experiments that demonstrate that a properly designed reverse sprinkler experiences no steady-state torque and does not rotate. Ignoring transients when the flow starts and stops, if any sustained rotation of the reverse sprinkler occurs, it is because a force couple produces a torque accompanied by vortex flow inside the body of the sprinkler. No steady-state rotation occurs if the vortex is suppressed or prevented from forming in the first place. Demonstrative proof is given that an ideal reverse sprinkler does not rotate.Publication An improved demonstration of charge conservation(American Association of Physics Teachers (AAPT), 2007) Rueckner, WolfgangPublication How to beat the Rayleigh resolution limit: A lecture demonstration(American Association of Physics Teachers (AAPT), 2002) Rueckner, Wolfgang; Papaliolios, CostasAn experiment is described in which the effect of instrument aperture size on resolution is easily demonstrated. Using diffraction as a tool rather than a limit to resolution, one can further demonstrate the possibility of detecting the presence of more than one object, even when the instrument cannot resolve the objects.Publication Inexpensive Microscopy for Introductory Laboratory Courses(American Association of Physics Teachers, 2009) Peidle, Joseph; Stokes, Chris; Hart, Robert; Franklin, Melissa; Newburgh, Ronald; Pahk, Joon; Rueckner, Wolfgang; Samuel, AraviWe present an inexpensive apparatus for bright field and fluorescence microscopy with video capture, suitable for introductory laboratory courses. Experiments on Brownian motion and the Boltzmann distribution of suspended particles in a gravitational field are described. The Boltzmann constant is measured in three ways, and the results fall within 15% of the accepted value.Publication Young's double-slit experiment with single photons and quantum eraser(American Association of Physics Teachers (AAPT), 2013) Rueckner, Wolfgang; Peidle, JosephAn apparatus for a double-slit interference experiment in the single-photon regime is described. The apparatus includes a which-path marker that destroys the interference as well as a quantum eraser that restores it. We present data taken with several light sources, coherent and incoherent and discuss the efficacy of these as sources of single photons.