Hooke’s law experiment using an electronic speckle pattern interferometry

Park, Jeongwoo; Huh, Jaehyuk

doi:10.1088/1361-6404/ab9c92

Cited by 4 publications

(3 citation statements)

References 22 publications

(42 reference statements)

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“…Based on the values in the Table 2, the average value of the spring constant is calculated to be, 𝒌 𝒂𝒗 = 24.96 N/m. There are some recent studies on Hooke's law resolving the harmonic motion (Menezes de Souza Lima, Venceslau & Nunes, 2002;Park & Huh, 2020;Kääntä, Kasper & Piirainen-Marsh, 2018).…”

Section: Spring Constant Determined By Hooke's Lawmentioning

confidence: 99%

Measurement of spring constant by means of Arduino: A STEM teaching proposal

Erol,

Navruz

2023

Momentum: Physics Education Journal

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This study advances a STEM teaching proposal and aims to determine spring constant of a spring pendulum by means of an Arduino microprocessor. The measurements are managed by simply letting the spring pendulum to oscillate freely and recording the distance perceived by the distance sensor-Arduino system as a function of time. The mean periods are estimated by using displacement-time plots of the harmonic motion and the results are used to estimate the spring constant. The spring constant is also determined conventionally by employing Hooke's law a number of times. The relative error rate between the two results is found to be about % 6.00 which is pretty acceptable. This approach is important in the sense that it is inexpensive and also encourages students to learn how to use the Arduino microprocessor. The approach adds to physics education efforts due to creating an enjoyable and beneficial teaching-learning environment.

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Section: Spring Constant Determined By Hooke's Lawmentioning

confidence: 99%

Measurement of spring constant by means of Arduino: A STEM teaching proposal

Erol,

Navruz

2023

Momentum: Physics Education Journal

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“…However, a simpler vibratory system to highlight the streak patterns themselves would be a better option. A beam seems a good option since it has been recently studied with didactic purposes using other optical techniques [13].…”

Section: Introductionmentioning

confidence: 99%

Speckle interference for naked-eye detection of vibrations

Córdova,

Limón,

Torres

2024

Eur. J. Phys.

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An affordable optical project for students is explained in this work. The experiment only requires a handheld laser illuminating a structure with stationary vibrations induced, but the interpretation of this phenomenon demands a strong understanding of optical interference and modal behavior of a bar. The operating principle employs the speckle phenomenon, which is a type of interference between coherent light incident on a rough surface and its reflection. This interference occurs in a luminous plane outside of the vibrating object and shows a granular structure due to the brightness fluctuations. Speckle is static but if the surface illuminated oscillates, the plane of interference moves from one side to the other, causing a streak pattern. Mode shapes of the object under examination can be naked eye detected from streak patterns. What is more, this phenomenon can be photographed using a manual focus digital camera. Therefore all the components of the procedure can be available (or acquired) by almost any physics laboratory, at any level, which would be unthinkable for optical experiments just a few years ago.

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“…However, few works focus on practical applications of laser speckle systems for assessing physical variables with quantitative results. Despite the realisation of didactic setups based on electronic speckle pattern interferometry for mechanical measurements [11], these methods require additional steps for counting fringes in space or frequency domains and exhibit limited dynamic range.…”

Section: Introductionmentioning

confidence: 99%

Didactic laser speckle experiments with a lensless camera

Fujiwara¹,

Fracarolli²,

Cordeiro³

2021

Eur. J. Phys.

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Laser speckles are granular patterns created through the interference of coherent light scattered by a rough surface. Besides comprising an appealing optical phenomenon, the speckle patterns enable applications in physical and biochemical measurements. This paper proposes didactic far-field (objective) speckle experiments using a visible laser source and a lensless webcam for implementation in optics labs or at home. Firstly, a ceramic mug works as the scattering surface to investigate the effect of the target-observation plane distance on the average size of light granules. Secondly, the speckle pattern deviations produced by the liquid inside the recipient are analysed to measure mass and temperature changes. Finally, the mug is replaced with a leaf to evaluate its biological activity based on the scattered light. Image processing tools carry out the quantification of speckle parameters like average size and correlation coefficient, achieving a good agreement between theory and practical results. The proposed far-field speckle experiments explore topics related to optics, instrumentation, and image computing straightforwardly, developing the desired skills for undergraduate and graduate students of physics and engineering courses.

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Hooke’s law experiment using an electronic speckle pattern interferometry

Cited by 4 publications

References 22 publications

Measurement of spring constant by means of Arduino: A STEM teaching proposal

Measurement of spring constant by means of Arduino: A STEM teaching proposal

Speckle interference for naked-eye detection of vibrations

Didactic laser speckle experiments with a lensless camera

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