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How Can a Quantum Particle be Found in a Classically Forbidden Region
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| Pengarang | : | Dennis Krause; Nikolai Jones |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 1) |
| Halaman | : | 16-19 |
| Abstrak | : | Among the many perplexing results of quantum mechanics is one that contradicts a result from introductory physics: the possibility of finding a quantum particle in a region that would be forbidden classically by energy conservation.1 An especially interesting example of this phenomenon with practical applications is quantum tunneling.2,3 Here we investigate the reasons for this puzzling result by focusing on the difference between how quantities like kinetic and potential energy are represented mathematically in classical and quantum mechanics. |
Autumn Foliage and the Photoelectric Effect
| Pengarang | : | P.-M. Binder |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 1) |
| Halaman | : | 14-15 |
| Abstrak | : | The prevailing approach to modern physics, in both algebra- and calculus-based textbooks, includes a considerable amount of historical exposition combined with physical insight. As an example, Einstein’s successful explanation of the photoelectric effect is very often cited as evidence for the particle nature of light. The purpose of this paper is to inform—or remind—the readers that the latter inference can and should be challenged. |
Explaining Quanta with Optical Illusions
| Pengarang | : | Gianluca Li Causi |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 1) |
| Halaman | : | 7-12 |
| Abstrak | : | In this work, I propose a way to help high school students and the general population understand quantum concepts by adopting a new inherently dual representation. Major difficulties in explaining to people the basic concepts of quantum mechanics reside in the apparent impossibility of representing quantum superposition with examples taken from everyday life. In this context, I propose a new pictorial paradigm that illustrates a number of quantum concepts by means of optical illusions, potentially without raising misconceptions. The method is based on “bistable reversible figures,” which induce in the viewer a multistable perception, conveying a direct understanding of superposition, random collapse, and observer effect via a sensorial experience. |
Enhancing students critical thinking skills through the use of DALL-E
| Pengarang | : | Stefan Küchemann; Steffen Steinert; Karina E. Avila; Jochen Kuhn |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 2) |
| Halaman | : | 138-139 |
| Abstrak | : | Large language models have emerged as a novel and popular phenomenon that attracts many people. These models are trained on comprehensive text data sets, equipping them with the ability to execute tasks such as text recognition, translation, prediction, and generation. However, their application in education is controversial, as they are known to produce content that can sometimes be misleading and erroneous.1 This poses a challenge to young students’ ability to discern between reliable and unreliable information that is generated by artificial intelligence (AI).2 Particularly in physics, advanced large language models demonstrate quite remarkable abilities, for example, being able to support teachers3 or students during inquiry-based learning.4 One example of such a generative AI model is DALL-E 2, which can create novel images based on text prompts. Many of these realistic-looking images are widely circulated on the web, making it difficult to protect the young generation from exposure to the generated AI. Therefore, it is critical to reinforce critical thinking in the classrooms in this era of misinformation. |
Ten annoying experiments to do at dinnertime
| Pengarang | : | James Lincoln |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 2) |
| Halaman | : | 136-137 |
| Abstrak | : | It is time to sit down to dinner, but first, physics! Sometimes social obligations interfere with time that could be better spent doing physics experiments. That is why I suggest ten experiments you can do at dinner or at a restaurant while out with friends. These are generally quite bad table manners, so I add the word “annoying” to the title. I hope these bring joy to you and calamity to your dining partners. |
Demonstrations of atmospheric scintillation: Stars vs. planets
| Pengarang | : | Sarah Lynn McGregor; Keith Goodale |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 2) |
| Halaman | : | 134-135 |
| Abstrak | : | When teaching observational techniques in astronomy courses, it is important to expose students to atmospheric effects, including seeing and transparency. Transparency characterizes the clarity of the atmosphere, while seeing relates to the sharpness of astronomical images caused by the stability of Earth’s atmosphere. Both factors can degrade astronomical observations,1 making techniques like adaptive optics (e.g., Refs. 2–4), mountaintop observatories, and placing telescopes in space a necessity. |
Quantum mechanics in the stars
| Pengarang | : | Donald A. Smith |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 2) |
| Halaman | : | 132-133 |
| Abstrak | : | Quantum mechanics lays out the rules governing the behavior of particles at and below the atomic level. It can be challenging to perceive the connections between the counterintuitive properties of particles in the quantum world and our experiences of the macroscopic world. There is, however, an interesting example that ties together the wave nature of matter with the engine that powers all life on Earth: we need quantum tunneling to explain how the Sun shines! In this article, I will outline a sequence of arguments you can walk through with your students to connect the simple act of bouncing a ball with the energetics of the solar core. Classical conservation of energy does not allow solar fusion, and this startling result enables the students to grapple with quantum tunneling and the interpretation of the wave function. |
Apply a smartphones magnetometer to measure the AC current of electrical equipment
| Pengarang | : | Pathom Vongvizay; Pongkaew Udomsamuthirun; Siriluk Ruangrungrote; Tunyanop Nilkamjon; Suppanyou Meakniti; Thitipong Kruaehong |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 2) |
| Halaman | : | 130-131 |
| Abstrak | : | Physics, as a foundational science, significantly impactseveryday life and underpins most technological developments.1 Despite its importance, some students face challenges in studying physics due to its abstract content, such as matheatical equations, and the lack of accessible laboratory tools.2 |
A Hands-on Investigation of Simple Motors
| Pengarang | : | Huaihua Zhang; Jinglu Zhang; William J. Browne |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 2) |
| Halaman | : | 126-128 |
| Abstrak | : | Building simple electric motors is an intriguing activity for students that helps them understand important concepts and principles in magnetism and electromagnetism.1,2 So, we built a simple electric motor in the laboratory based on a problem from a high-stakes exam (i.e., The National College Entrance Examination in China). However, we found that the “incorrect” answer was actually correct! To explicate the discrepancies, we will first introduce the problem and its original solutions, then we will demonstrate our experimental results of the simple motor through videos, and finally, we will provide explanations. |
Pendulum Motion of a Conical Object on an Incline
| Pengarang | : | Rod Cross |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 63 (No. 2) |
| Halaman | : | 122-124 |
| Abstrak | : | A cone-shaped object placed on a slight incline oscillates back and forth as a stringless pendulum. Experimental and theoretical results are presented for two steel balls of different diameter joined together. |