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Navalkar, Vinita; Sawant, Sumedh; Mourya, Shubham – Physics Education, 2021
The concept of black body is of primary importance in studying the energy transfer of thermal electromagnetic radiation at all wavelengths. Several physical bodies like incandescent lamps, electric heaters, stoves, the sun and the other stars, microwave background radiation, etc., are considered to be black bodies as their radiation spectra fits…
Descriptors: Energy, Radiation, Light, Physics
Yan, Peizheng; Xia, Haojie; Li, Jianquan; Wang, Yonghong; Wei, Yongqing; Ji, Feng; Shu, Shuangbao – Physics Teacher, 2019
Light polarization, which is the direction of electromagnetic field oscillation, provides information that is highly different from that of spectral and intensity images and thus can enhance various fields of optical metrology. Polarization imaging can be also used by combining polarization and imaging, thereby providing polarization and spatial…
Descriptors: Telecommunications, Handheld Devices, Light, Energy
Goldston, M. Jenice; Pan, Shanlin; Boykin, Karen; Allison, Elizabeth; Wehby, Scott – Science Teacher, 2016
Nanoscience development affects almost every discipline of science, engineering, and technology. Not surprisingly, "the science of small" is also finding its way into science classrooms. In general, "nano" refers to a billionth of a meter--about 1/50,000 the width of a hair follicle. The term "nanoparticle" usually…
Descriptors: Molecular Structure, Technology, Chemistry, Science Instruction
Kaur, Tejinder; Blair, David; Moschilla, John; Zadnik, Marjan – Physics Education, 2017
The Einstein-First project approaches the teaching of Einsteinian physics through the use of physical models and analogies. This paper presents an approach to the teaching of quantum physics which begins by emphasising the particle-nature of light through the use of toy projectiles to represent photons. This allows key concepts including the…
Descriptors: Science Instruction, Physics, Scientific Principles, Probability
Ribeiro, C. I. – Physics Teacher, 2014
In this article we propose an activity aimed at introductory students to help them understand the Stefan-Boltzmann and Wien's displacement laws. It only requires simple materials that are available at any school: an incandescent lamp, a variable dc energy supply, and a computer to run an interactive simulation of the blackbody spectrum.…
Descriptors: Science Instruction, Physics, Scientific Principles, Lighting
Costa, G. G. G.; Pietronero, R. C.; Catunda, T. – Physics Education, 2012
In this paper we study the transient behaviour of RC circuits with supercapacitors, varying R between 1 and 100 [omega]. We demonstrate that supercapacitors behave as ideal capacitors in series with an internal resistance (r [similar to] 8 [omega] for C = 0.2 F, 5.5 V). This result is important to optimize the demonstration of RC circuits using a…
Descriptors: Physics, Science Instruction, Scientific Principles, Light
Singh, Satya Pal – European Journal of Physics Education, 2013
In this paper of I have reviewed the test done for validating the special theory of relativity using masers and lasers in last one century. Michelson-Morley did the first experimental verification for the isotropy of space for the propagation of light in 1887. It has an accuracy of 1/100th of a fringe shift. The predicted fringe shift on the basis…
Descriptors: Lasers, Scientific Concepts, Science Experiments, Light
Rice, E. M.; Bradshaw, D. S.; Saadi, K.; Andrews, D. L. – European Journal of Physics, 2012
The spatial variation in phase and the propagating wave-front of plane wave electromagnetic radiation are widely familiar text-book territory. In contrast, the developing amplitude and phase of radiation emitted by a dipole or multipole source generally receive less attention, despite the prevalence of these systems. There is additional complexity…
Descriptors: Science Instruction, Radiation, Energy, Magnets
Gabovich, A. M.; Voitenko, A. I. – European Journal of Physics, 2012
The problem of charge motion governed by image force attraction near a plane metal surface is considered and solved self-consistently. The temporal dispersion of metal dielectric permittivity makes the image forces dynamic and, hence, finite, contrary to the results of the conventional approach. Therefore, the maximal attainable velocity turns out…
Descriptors: Science Instruction, Physics, Scientific Principles, Motion
Asti, G.; Coisson, R. – European Journal of Physics, 2011
Problems involving polarized plane waves and currents on sheets perpendicular to the wavevector involve only one component of the fields, so it is possible to discuss electrodynamics in one dimension. Taking for simplicity linearly polarized sinusoidal waves, we can derive the field emitted by currents (analogous to dipole radiation in three…
Descriptors: Radiation, Energy, Scientific Principles, Science Instruction
Kraftmakher, Yaakov – European Journal of Physics, 2012
Nearly two centuries ago, Fourier discovered that any periodic function of period T can be presented as a sum of sine waveforms of frequencies equal to an integer times the fundamental frequency [omega] = 2[pi]/T (Fourier's series). It is impossible to overestimate the importance of Fourier's discovery, and all physics or engineering students…
Descriptors: Undergraduate Study, Science Laboratories, Science Activities, Engineering Education
Kamata, Masahiro; Abe, Mayumi – Physics Education, 2012
A thick line drawn on a sheet of paper with a 6B pencil is electrically conductive and its resistance can be roughly estimated using a simple tester made of a light-emitting diode (LED) and a lithium coin-type cell. Using this hand-drawn resistor and the LED tester, we developed teaching materials that help students to understand how electrical…
Descriptors: Energy, Science Instruction, Physics, Light
Smith, Glenn S. – European Journal of Physics, 2011
Thought experiments involving a light clock are common in introductory treatments of special relativity, because they provide a simple way of demonstrating the non-intuitive phenomenon of time dilation. The properties of the ray or pulse of light that is continuously reflected between the parallel mirrors of the clock are often stated vaguely and…
Descriptors: Scientific Concepts, Energy, Magnets, Physics
Gillette, Brandon; Hamilton, Cheri – Science Scope, 2011
When viewing objects of different colors, you might notice that some appear brighter than others. This is because light is reflected differently from various surfaces, depending on their physical properties. The word "albedo" is used to describe how reflective a surface is. The Earth-atmosphere has a combined albedo of about 30%, a number that is…
Descriptors: Science Instruction, Scientific Concepts, Learning Activities, Color
Thompson, Frank – Physics Education, 2010
A recent article showed how the influx of neodymium magnets has provided striking demonstrations of the interactions between magnets and conductors. The "shaking torch" is yet another example. Many of these torches require no batteries and can be submerged in water--indeed, a light for life. In this article, the author disassembles a shaking torch…
Descriptors: Magnets, Energy, Light, Interaction
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