Teaching the Doppler effect in astrophysics

Hughes, Stephen; Cowley, Michael J.

doi:10.1088/1361-6404/aa5446

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…The Doppler effect predominantly involves electromagnetic waves, the principle demonstrated using acoustic waves is the same. In astrophysics, the relativistic effects often come into play which is not applicable to acoustic Doppler, and so the experiment in this paper elucidates the principle of electromagnetic Doppler effect when the velocity is much large than the speed of light [29].…”

Section: Figure 1 Research Flowmentioning

confidence: 99%

Simple Experiment of Doppler Effect Using Smartphone Microfon Sensor

Malik

Mugiri

Zakwandi

et al. 2020

J. Penelit. Fis. Apl.

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Doppler effect is the physical phenomena in which the emitted frequency is a source of change at a time when accepted by the detector due to relative movement of the detector towards the source of the wave or vice versa. This research aims to identify the Doppler effect symptoms by utilizing sensors found in smartphones. This research uses experimental method that combine the mechanical instruments and microphone smartphone sensor as measurement tool. The mechanical instruments used are a smartphone with the help of frequency sound generator software, Physics Toolbox, the camera as an instrument of data collectors, and Tracker as a motion analyzer software. Based on the results of the experiments, the author retrieved the value of the error and the standard deviation of each of the observed symptoms. The symptoms of Doppler effect upon source moving closer and moving away when the silent observer shows the error value of 0.04 % and 0.1185 % respectively with a standard deviation of 0.018 and 1.005. In addition, the experiment on Doppler effect as the source is staying still and as the observer approaching the source provides error value of 8.60 % and standard deviation of 13.501. As for the experiment on Doppler effect as the source and the observers are approaching each other displays the error value of 4.31 % and the standard deviation of 0.087. Overall, this experiment generates error value of 3.267 % and standard deviation of 3.665, inferring that the experiments conducted are accurate and precise in representing the Doppler effect phenomenon. Based on the results of this experiments, the researcher recommends to carry out practicum on Doppler effects with the help of smartphone sensors.

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Section: Figure 1 Research Flowmentioning

confidence: 99%

Simple Experiment of Doppler Effect Using Smartphone Microfon Sensor

Malik

Mugiri

Zakwandi

et al. 2020

J. Penelit. Fis. Apl.

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“…This issue is unavoidably neglected in the investigations involving the acoustic version of the experiment [1][2][3][4] where it could be even explicitly contradicted by highlighting symmetries between the approaching and receding phases, without specifying that they are valid only approximately and in a very limited range of velocities (for example [4] p. 567).…”

Section: Moving Source and Receiver At Rest: Measuring The Doppler Shiftmentioning

confidence: 99%

“…The Doppler effect has always been a highly intriguing phenomenon for students and a source of teachers' inspiration for constantly renewed educational proposals. Recently, for example, the use of devices closer to students' experience (smartphones) and more powerful and versatile tools for analyzing video recordings (Tracker), has been the recurring focus of several publications devoted to the acoustic Doppler effect (see for example [1][2][3][4] and the references therein). Still in connection with the use of new technologies, starting from a work by Serra [5], other recent papers studied the Doppler shift with plane surface waves on water [6,7].…”

Section: Introductionmentioning

confidence: 99%

Doppler effect in the ripple tank: further experiments with a moving source

D’Anna,

Corridoni,

Sposetti

et al. 2023

Eur. J. Phys.

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In this paper, we extend some recent works about the Doppler effect in surface waves on water. We improve the experimental set up by exploring several situations: source in motion with constant velocity and receiver at rest, source at rest and receiver in motion with constant velocity, as well as both source and receiver in motion. Thereby we produce fractional frequency changes Δ f / f 0 of the order of 40%–50%, far larger than those obtained by more traditional sound experiments. The experimental setup, the data collection and the data analysis also allow to highlight some aspects relevant from a didactic point of view, in particular, the experimental results clearly show the nonlinearity of the Doppler shift with the moving source velocity.

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“…(low pitch) when the siren moves away from the listener. Several studies reported well-designed approaches to support students' learning about the Doppler effect [3][4][5][6][7][8][9]. They integrated up-todate technologies or devices into experiments, for example, using a smartphone application as a sound generator, analysing data via the Tracker freeware, and applying a video analysis technique to a ripple tank [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Analysing the acoustic Doppler effect using an Arduino sensor

Phayphung,

Prasitpong,

Rakkapao

2024

Phys. Educ.

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The article presents an experiment for studying the Doppler effect using the Arduino sensor integrated with LabVIEW to detect the frequency of the rotating sound source. A mobile phone application is used as a sound generator emitting 500–1100 Hz frequencies and rotated in a uniform circular motion. The Arduino sound sensor is affixed at rest, acting as a listener to observe the frequency of the mobile phone moving toward and away from it. This experiment can express a significant concept of the Doppler effect concerning a shift in the observed frequency of a sound wave when the sound source moves relative to the observer. Moreover, students can interpret a graph and calculate the tangential speed of the rotating mobile phone.

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Teaching the Doppler effect in astrophysics

Cited by 4 publications

References 8 publications

Simple Experiment of Doppler Effect Using Smartphone Microfon Sensor

Simple Experiment of Doppler Effect Using Smartphone Microfon Sensor

Doppler effect in the ripple tank: further experiments with a moving source

Analysing the acoustic Doppler effect using an Arduino sensor

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