Smartphones and Tracker in the <i>e</i>/<i>m</i> experiment

Pirbhai, Massooma

doi:10.1088/1361-6552/ab49d3

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…Besides classical mechanics, other proposed experiments involve electromagnetism of modern Physics. Recently, Pirbhai [8] measured the e/m ratio using smartphones to measure the magnetic field strengths and phone cameras and video analysis to determine the charge-to-mass ratio of the electron with considerable accuracy. Simo [9] also proposed an experiment involving electromagnetism and, in this case, Faraday-Lenz law.…”

Section: Experiments Involving Video Analysis and Sensorsmentioning

confidence: 99%

Smartphone sensors and video analysis: two allies in the physics laboratory battle field

Martı́

Cabeza

Stari

2021

J. Phys.: Conf. Ser.

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Recently, two technologies: video analysis and mobile device sensors have considerable impacted Physics teaching. However, in general, these techniques are usually used independently. Here, we focus on a less-explored feature: the possibility of using supplementary video analysis and smartphone (or other mobile devices) sensors. First, we review some experiments reported in the literature using both tools. Next, we present an experiment specially suited to compare both resources and discuss in detail some typical results. We found that, as a rule, video analysis provides distances or angular variables, while sensors supplies velocity or acceleration (either linear or angular). The numerical differentiation of higher derivatives, i.e. acceleration, usually implies noisier results while the opposite process (the numerical integration of a temporal evolution) gives rise to the accumulation of errors. In a classroom situation, the comparison between these two techniques offers an opportunity to discuss not only concepts related to the specific experiment but also with the experimental and numerical aspects including their pros and cons.

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Section: Experiments Involving Video Analysis and Sensorsmentioning

confidence: 99%

Smartphone sensors and video analysis: two allies in the physics laboratory battle field

Martı́

Cabeza

Stari

2021

J. Phys.: Conf. Ser.

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“…They include fields of mechanics, optics, thermodynamics and modern physics, e.g. analysing free fall, understanding Snell's law, observation of the burning of a candle process, and radioactive decay [1][2][3][4][5][6][7][8]. The experiment involves both slow and fast processes.…”

Section: Introductionmentioning

confidence: 99%

Elongation effect on the recorded moving bar analysis using Tracker

Santosa¹

2022

Phys. Educ.

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The image of free-falling bar has been recorded to study the effect of the motion on its observed length. This moving bar image is analysed using the Tracker software to determine its length and the end bar’s position. An elongated appearance of the bar has been observed with movement. This effect relies on the speed and the exposure time during image recording. When recording at 25 fps with exposure time of 0.04 s, the 33 cm bar’s apparent size becomes (54.4 ± 0.6) cm at speed of 5.88 m s−1. The elongation is shorter with a shorter exposure time.

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“…The lower computational overheads with AR apps also allow them to operate on smartphones. The imaging capabilities offered by these devices has resulted in their widespread use in experimentation [18,19].…”

Section: Introductionmentioning

confidence: 99%

Augmented reality direct current glow discharge experimentation

et al. 2020

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The glowing discharges of plasma obtained by introducing direct current high voltages between two electrodes in a chamber that contains a low pressure gas produces a spectacular effect that makes it attractive to be used as a laboratory experiment for students. Setting up this experiment is however costly and has crucial safety issues to be addressed. An augmented reality approach here allows students to conduct such an experiment effectively. It was designed to guide students on how to conduct the experiment safely and properly, as well as to allow them to note the voltage breakdown values according to Paschen’s rule. The tool has the strong advantage of allowing students to conduct experimentation without removing any of the real-life and tactile features that help to constitute cognition events in the natural world. It also yielded positive responses when tested on 39 high school students as part of an outreach program for science and technology.

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Smartphones and Tracker in the e/m experiment

Cited by 7 publications

References 15 publications

Smartphone sensors and video analysis: two allies in the physics laboratory battle field

Smartphone sensors and video analysis: two allies in the physics laboratory battle field

Elongation effect on the recorded moving bar analysis using Tracker

Augmented reality direct current glow discharge experimentation

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