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Brom, Joseph M. – Journal of Chemical Education, 2017
The concept of wave-particle duality in quantum theory is difficult to grasp because it attributes particle-like properties to classical waves and wave-like properties to classical particles. There seems to be an inconsistency involved with the notion that particle-like or wave-like attributes depend on how you look at an entity. The concept comes…
Descriptors: Chemistry, Science Instruction, Measurement Techniques, Scientific Concepts
Adamides, E.; Kavadjiklis, A.; Koutroubas, S.K.; Moshonas, N.; Tzedakis, A.; Yiasemides, K. – Physics Education, 2014
In continuation of our investigation into the buildup phenomenon appearing in gamma ray attenuation measurements in laboratory experiments we study the dependence of the buildup factor on the area of the absorber in an effort to reduce the buildup of photons. Detailed measurements are performed for up to two mean free paths of [superscript 60]Co…
Descriptors: Science Instruction, Science Laboratories, Laboratory Experiments, Physics
Childs, Nicholas B.; Horányi, Mihály; Collette, Andrew – Physics Teacher, 2013
We describe the principles of macroscopic charged particle detection in the laboratory and their connections to concepts taught in the physics classroom. Electrostatic dust accelerator systems, capable of launching charged dust grains at hypervelocities (1-100 km/s), are a critical tool for space exploration. Dust grains in space typically have…
Descriptors: Science Instruction, Physics, Science Laboratories, Molecular Structure
Stewart, John; Skinner, Stephen; Stewart, Gay – Physics Teacher, 2013
The leaf electroscope is a common piece of demonstration equipment found in many high school and introductory college physics laboratories. Its simplicity allows a compelling demonstration of electrostatic forces, and its versatility makes it useful in the demonstration of a number of physical phenomena. The electroscope has a long history; a…
Descriptors: Science Instruction, Laboratory Equipment, College Science, Science Laboratories
Micklavzina, Stanley; Almqvist, Monica; Sörensen, Stacey L. – Physics Education, 2014
Stanley Micklavzina, a US physics educator on sabbatical, teams up with a Swedish national research laboratory, a synchrotron radiation experimental group and a university science centre to develop and create educational and public outreach projects. Descriptions of the physics, science centre displays and public demonstrations covering the…
Descriptors: Physics, Science Laboratories, Radiation, Molecular Structure
McCain, Daniel F.; Allgood, Ottie E.; Cox, Jacob T.; Falconi, Audrey E.; Kim, Michael J.; Shih, Wei-Yu – Journal of Chemical Education, 2012
Only a few pedagogical experiments have been published dealing specifically with the hydrophobic interaction though it plays a central role in biochemistry. A set of experiments is presented in which students partition a variety of colorful indicator dyes in biphasic water/organic solvent mixtures. Students monitor the partitioning visually and…
Descriptors: Physics, Biochemistry, Science Laboratories, Water
Euler, Manfred – Physics Education, 2013
A hands-on model of scanning tunnelling microscopy (STM) is presented. It uses near-field imaging with sound and computer assisted visualization to create acoustic mappings of resonator arrangements. Due to the (partial) analogy of matter and sound waves the images closely resemble STM scans of atoms. Moreover, the method can be extended to build…
Descriptors: Science Instruction, Physics, Hands on Science, Laboratory Equipment
Harden, Joshua; Joshi, Amitabh; Serna, Juan D. – European Journal of Physics, 2011
Single and double electromagnetically induced transparencies (EIT) in a medium, consisting of four-level atoms in the inverted-Y configuration, are discussed using mechanical and electrical analogies. A three-coupled spring-mass system subject to damping and driven by an external force is used to represent the four-level atom mechanically. The…
Descriptors: Undergraduate Students, Physics, Science Instruction, College Science
Harbola, Varun – European Journal of Physics, 2011
In this paper, we accurately estimate the ground-state energy and the atomic radius of the helium atom and a helium-like Hookean atom by employing the uncertainty principle in conjunction with the variational approach. We show that with the use of the uncertainty principle, electrons are found to be spread over a radial region, giving an electron…
Descriptors: Science Instruction, Molecular Structure, Science Laboratories, Computation
Cepic, Mojca – European Journal of Physics Education, 2012
The introduction of teaching about liquid crystals is discussed from several points of view: the rationale why to teach them, the basics about liquid crystals or what the teacher should teach about them, the fundamental pre-knowledge of students required, the set of experiments accompanying the teaching and the brief report on the already…
Descriptors: Science Instruction, Science Experiments, Physics, Scientific Concepts
Matteucci, Giorgio; Castaneda, Roman; Serna, Samuel; Medina, Francisco; Garcia-Sucerquia, Jorge – European Journal of Physics, 2010
An experiment analogous to that devised by Grimaldi and subsequently repeated by Young to study the nature of light has been realized with electrons. Following the Grimaldi and Young line of thought, an original approach is presented to introduce undergraduate physics students to the wave behaviour of electrons. An electron microscope equipped…
Descriptors: Physics, Science Experiments, Science Instruction, College Science
Grober, S.; Vetter, M.; Eckert, B.; Jodl, H. -J. – European Journal of Physics, 2010
The Rutherford scattering experiment plays a central role in working out atomic models in physics and chemistry. Nevertheless, the experiment is rarely performed at school or in introductory physics courses at university. Therefore, we realized this experiment as a remotely controlled laboratory (RCL), i.e. the experiment is set up in reality and…
Descriptors: Physics, Science Instruction, Science Experiments, Energy
La Rocca, Paola; Riggi, Francesco – European Journal of Physics, 2009
The absorption of beta rays from a radioactive source in different materials was investigated by the use of a simple setup based on a Geiger counter and a set of absorber sheets. The number of electrons traversing the material was measured as a function of its thickness. Detailed GEANT simulations were carried out to reproduce the obtained…
Descriptors: Undergraduate Study, College Science, Science Instruction, Science Experiments
Mazur, Zygmunt; Grech, Dariusz – European Journal of Physics, 2008
A simple model of the random Brownian walk of a spherical mesoscopic particle in viscous liquids is proposed. The model can be solved analytically and simulated numerically. The analytic solution gives the known Einstein-Smoluchowski diffusion law r[superscript 2] = 2Dt, where the diffusion constant D is expressed by the mass and geometry of a…
Descriptors: Science Instruction, Science Laboratories, Physics, College Science
Freeman, W. Larry; Freda, Ronald F. – Physics Teacher, 2007
Many general physics laboratories involve the use of springs to demonstrate Hooke's law, and much ado is made about how this can be used as a model for describing the elastic characteristics of materials at the molecular or atomic level. In recent years, the proliferation of computers, and appropriate sensors, have made it possible to demonstrate…
Descriptors: Science Experiments, Physics, Scientific Principles, Mechanics (Physics)
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