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Showing 1 to 15 of 54 results Save | Export
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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
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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
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Singh, Sushil Kumar; Kashyap, Jaya Shivangani; Rajwani, Priyanka; Kaur, Savinda – Physics Education, 2019
Understanding reflection and refraction are an integral part of school and college learning. In nature even birds and fish (Archer fish) very skillfully use refraction to strike down prey present above or below the water surface. Fermat's principle allows one to look beyond the reasons behind the laws governing the reflection and refraction. A…
Descriptors: Scientific Concepts, Scientific Principles, Computer Assisted Instruction, Science Experiments
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Kvittingen, Eivind V.; Kvittingen, Lise; Melø, Thor Bernt; Sjursnes, Birte Johanne; Verley, Richard – Journal of Chemical Education, 2017
This article describes a combined UV-photometer and fluorimeter constructed from 3 LEDs and a few wires, all held in place with Lego bricks. The instrument has a flexible design. In its simplest version, two UV-LEDs (355 nm) are used as light source and to detect absorption, and a third LED, in the visible spectrum (e.g., 525 nm), is used to…
Descriptors: Spectroscopy, Scientific Principles, Scientific Methodology, Light
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Kesonen, Mikko Henri Petteri; Asikainen, Mervi Anita; Hirvonen, Pekka Emil – EURASIA Journal of Mathematics, Science & Technology Education, 2017
In the present article, the context-dependency of student reasoning is studied in a context of optics. We investigated introductory students' explanations about the behavior of light when different light sources, namely a small light bulb and a laser, were used in otherwise identical task assignments. The data was gathered with the aid of pretest…
Descriptors: Light, Optics, Science Instruction, Scientific Principles
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Swinehart, William E.; Zimmerman, Bonnie L.; Powell, Kinsey; Moore, Stephen D.; Iordanov, Tzvetelin D. – Journal of Chemical Education, 2014
A concept of the turbidimetric method for determining the concentration of ethanol in water-ethanol mixtures is described. A closed sample cell containing the analyte was heated to achieve vapor saturation and subsequent condensation. As the condensation occurred, the decrease in percentage transmittance with time due to light scattering was…
Descriptors: Science Instruction, Scientific Principles, Water, Light
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Krawczyk, Tomasz; Slupska, Roksana; Baj, Stefan – Journal of Chemical Education, 2015
This work describes a single-session laboratory experiment devoted to teaching the principles of factorial experimental design. Students undertook the rational optimization of a luminol oxidation reaction, using a two-level experiment that aimed to create a long-lasting bright emission. During the session students used only simple glassware and…
Descriptors: Science Instruction, Science Laboratories, Laboratory Experiments, Science Experiments
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Navratil, Zdenek; Dosoudilova, Lenka; Jurmanova, Jana – Physics Education, 2013
In this paper an experiment to study Planck's radiation law is presented. The spectra of a heated furnace and of a halogen lamp under various conditions were measured with a small USB grating spectrometer and fitted using Planck's law. The temperature determined from the fit was then compared with the results of comparative temperature…
Descriptors: Spectroscopy, Science Instruction, Science Experiments, Radiation
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Lopez-Arias, T. – European Journal of Physics, 2012
We discuss a brief part of a famous paper on sound and light written by Thomas Young in 1800. We show that the proverbial intuition of this famous polymath leads to the discussion of several important and complex fluid dynamics phenomena regarding the behaviour of streams of air. In particular, we show that Young had already explained the adhesion…
Descriptors: Mechanics (Physics), Science Instruction, Acoustics, Light
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Campbell, Dean J.; Andrews, Mark J.; Stevenson, Keith J. – Journal of Chemical Education, 2012
Carbon soot has been known since antiquity, but has recently been finding new uses as a robust, inexpensive nanomaterial. This paper describes the superhydrophobic properties of carbon soot films prepared by combustion of candle wax or propane gas and introduces some of the optical absorption and fluorescence properties of carbon soot particles.…
Descriptors: College Science, Science Instruction, Chemistry, Undergraduate Study
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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
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Limsuwan, P.; Asanithi, P.; Thongpool, V.; Piriyawong, V.; Limsuwan, S. – Physics Education, 2012
A lens based on liquid in the confined volume of a volumetric flask was presented as a potential projector to observe microscopic floating organisms or materials. In this experiment, a mosquito larva from a natural pond was selected as a demonstration sample. By shining a light beam from a laser pointer of any visible wavelength through the…
Descriptors: Projection Equipment, Lasers, Physics, Science Instruction
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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
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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
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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
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