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Showing 1 to 15 of 493 results Save | Export
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Alexander V. Shokurov; Carlo Menon – Journal of Chemical Education, 2023
Many aspects of electrochemical education, such as electroanalysis demonstrations, require three-electrode-cell experimental setups. Many researchers and educators use screen-printed electrochemical electrodes, which are miniature and disposable but are relatively expensive and use proprietary fabrication components. The present article describes…
Descriptors: Chemistry, Science Instruction, Scientific Research, Science Education
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Gill, Melvin; Love, Tyler S. – Technology and Engineering Teacher, 2021
Laser engravers/cutters have found their way into many technology and engineering (T&E) education laboratories. Their use can range from from cutting balsa wood truss designs to embossing a decorative logo on a student's project, and the range of materials can be almost as broad. While their capabilities can be virtually endless and the…
Descriptors: Lasers, Vocational Education, Safety, Machine Tools
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Michaela Kuchynka; Hana Holcova Polanska; Jaromir Gumulec; Viktor Kanicky; Tomas Vaculovic – Journal of Chemical Education, 2023
A new experiment using laser ablation with inductively coupled plasma mass spectrometry (LA-ICP-MS) was designed for chemistry undergraduate students. While most analytical methods only provide information on the amount of the analyte, LA-ICP-MS allows extra information on the distribution of the element in the sample. Because it achieves…
Descriptors: Laboratory Experiments, Chemistry, Undergraduate Study, Science Instruction
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Tolga Atilla Ceranoglu; Chloe Hutt Vater – Journal of Attention Disorders, 2024
Objective: To review the existing literature on transcranial photobiomodulation (tPBM) treatment effects on Autism Spectrum Disorder (ASD), in search for an effective treatment of a symptom cluster identified largely by contributions from late Dr. Biederman who asserted that they frequently present with Attention Deficit Hyperactivity Disorder…
Descriptors: Autism Spectrum Disorders, Intervention, Brain, Attention Deficit Hyperactivity Disorder
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Hughes, Stephen; Wegener, Margaret; Gurung, Som – Physics Education, 2022
In this paper, a simple method is described for visually demonstrating that the wavelength of light reduces when entering a medium of higher refractive index. When a violet laser (405 nm) is reflected off the surface of a Blu-ray disc (track spacing 320 nm) diffraction cannot occur since the wavelength is greater than the track spacing. However,…
Descriptors: Science Instruction, Physics, Light, Lasers
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Pal, Arnab; Panchadhyayee, Pradipta; Sahu, Kriti R.; Syam, Debapriyo – Physics Teacher, 2022
The refractive index is a number that governs how light changes its direction of propagation as it enters one material medium from another. This phenomenon is known as refraction and the angles of incidence and refraction of light, referred to the normal to the interface of the two media at the point of incidence, are related by Snell's law. The…
Descriptors: Science Instruction, Physics, Light, Scientific Concepts
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Ratanavis, Amarin – Physics Education, 2022
A single-slit diffraction experiment in an introductory physics laboratory is generally comprised of a rectangular slit and a laser source. The laser beam is sent to the slit producing the well-known diffraction pattern on the screen. This paper proposes a simple modification of the single-slit diffraction experiment to increase student attention…
Descriptors: Science Instruction, Science Laboratories, Physics, Lasers
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Harnish, Peter – Physics Teacher, 2021
Possibly the greatest irony of physics education is the difficulty of demonstrating optics in a visible way. The two most common solutions to this conundrum are to either use "all-inclusive" optical apparatuses, like a large-format camera, or to rely on classic ray-tracing diagrams. While the former looks elegant while demonstrating the…
Descriptors: Physics, Science Instruction, Optics, Visual Aids
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Ludwig-Petsch, Kim; Hirth, Michael; Kuhn, Jochen – Physics Teacher, 2022
The typical sound of George Lucas' laser blaster in the "Star Wars" series is well known. What does a laser blaster in "Star Wars" sound like, and why? Here we show a simple way to produce this sound by using low-cost lab material, like a spring or a Slinky. Building on the work of Crawford, who analyzed the sound of a Slinky…
Descriptors: Science Instruction, Physics, Lasers, Acoustics
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Chen, Yu; Kim, Hee Ra; Ahn, Yu Jin; Kim, Jung Bog – Physics Teacher, 2022
The laser pointer has been widely used to demonstrate some simple optics phenomena, like reflection, refraction, total reflection, and diffraction. However, the rays of laser light cannot be seen in the air because the scattered light is too weak. Many physics teachers use milk or smoke to visualize rays of laser light in physics labs, but it is…
Descriptors: Science Experiments, Physics, Optics, Light
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Philip A. Kocheril; Makaela M. Jones; Jessica Z. Kubicek-Sutherland – Journal of Chemical Education, 2022
Raman scattering spectroscopies are important analytical tools in modern chemistry. Here, we describe the construction of the unamplified Raman scattering analysis (URSA) instrument: an inexpensive, open-table Raman spectrometer that uses a 532 nm diode-pumped laser as a light source. Upon application of this spectrometer to DNA extracted from…
Descriptors: Spectroscopy, Science Instruction, Chemistry, Lasers
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Catherine L. Jahncke; Wenyao Zhang; Bethany M. DeMuynck; Adam D. Hill – Journal of Chemical Education, 2022
Raman scattering is a powerful tool for revealing the vibrations of molecules, but as a nonlinear optical phenomenon, its signals can change via mechanisms like resonance enhancement that have no direct analogue in infrared spectroscopy. In this work, complementary measurements conducted on 4-nitrophenol and its conjugate base allow students to…
Descriptors: Science Instruction, Chemistry, Science Laboratories, Lasers
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Flowers, Jim; Wierzbicki, Alexander; Weldy, Alexandra – Technology and Engineering Teacher, 2020
The use of CO[subscript 2] laser cutters/engravers in technology and engineering education "allows even beginning students to produce professional parts in a very short time [and] empowers and motivates students, helping to bring out their creativity" (Flowers, 2000, p. 11). They are fast, accurate, fun to use, and they facilitate…
Descriptors: Technology Education, Engineering Education, Visual Aids, Design
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Avvari, Ravi Kant – Physics Teacher, 2020
A diffraction grating is a plane surface having a large number of closely spaced slits running in parallel. When light of appropriate wavelength is incident on a diffraction grating it functions as a spectrometer, able to separate the light into its spectral components. Physical examples of interest for diffraction in the real world are…
Descriptors: Clothing, Light, Lasers, Science Instruction
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Ferreira, Maria Carolina; de Matos, Izabella Lima; de Toledo, Isabela Porto; Honório, Heitor Marques; Mondelli, Maria Fernanda Capoani Garcia – Journal of Speech, Language, and Hearing Research, 2021
Purpose: This systematic review aimed to analyze the effects of low-level laser therapy (LLLT) on the severity of tinnitus when compared to no therapy or other modalities of therapies. Method: A systematic review protocol was registered at the International Prospective Register of Systematic Reviews (PROSPERO) under the Registration Number…
Descriptors: Therapy, Lasers, Patients, Outcomes of Treatment
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