Demonstração da lei do inverso do quadrado com o auxílo de um tablet/smartphone

Vieira, L.P.; Lara, V.O.M.; Amaral, D. F.

doi:10.1590/s1806-11172014000300017

Cited by 14 publications

(19 citation statements)

References 4 publications

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“…Numerous investigations have been published on laboratory experiments in which digital cameras or webcams are used [3][4][5][6][7] , optical mice 8,9 and games consoles and their wireless devices which control the games [10][11][12][13][14] . Also the sensors of smartphones are beginning to be used to make precise measurements [15][16][17][18][19][20] . These sensors allow carrying out direct measurements of physical magnitudes if we have previously downloaded specific applications, most of which are free, that allow us to show measurements on the screen of the smartphone, store them and even do a graph with the results.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the magnetic field of small magnets with a smartphone: a very economical laboratory practice for introductory physics courses

et al. 2015

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In this work we propose an inexpensive laboratory practice for the laboratory of an introductory course of Physics for any grade of Sciences and Engineering, which was very well received by our students, where a smartphone (iOS, Android or Windows Phone is irrelevant) is used together with some mini magnets, similar to those that can be found in the door of our refrigerators, a 20 cm long school rule, a paper and a free application (app) for measuring the magnetic field using the magnetic fields sensor or magnetometer of the smartphone, which needs to be downloaded and installed. The apps we have used are: Magnetometer (iOS), Magnetometer Metal Detector and Physics Toolbox Magnetometer (Android). Nothing else is needed. Cost of this practice: 0 coins. The main purpose of the practice is that students determine the dependence of the component x of the magnetic field produced by different magnets (from the typical magnets that are decorated in refrigerators even with a ring magnet and spherical magnet). We have obtained that the dependency of the magnetic field with the distance is of the form x -3 , in total agreement with the theoretical analysis. The secondary objective is to apply the technique of least squares fit to obtain this exponent and the magnetic moment of the magnets, with theirs corresponding absolute error.

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Section: Introductionmentioning

confidence: 99%

Measurement of the magnetic field of small magnets with a smartphone: a very economical laboratory practice for introductory physics courses

et al. 2015

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“…Por outro lado, podemos associar softwares presentes em dispositivos eletrônicos, como tablets e smartphones,à atividades experimentais [15][16][17][18]. Como sabemos, a experimentação exerce um papel de destaque no ensino de física.…”

Section: O Efeito Doppler E Tic'sunclassified

“…O uso de smartphones e tablets como instrumentos de medidas associadosà experimentação também tem sido investigados [15][16][17][18]. Esses recursos didáticos, quando utilizados em sala de aula, podem contribuir para enriquecer a abordagem didática e o processo ensino-aprendizagem.…”

Section: Introductionunclassified

Efeito Doppler com tablet e smartphone

Fernandes

Auler

Huguenin

et al. 2016

Rev. Bras. Ensino Fís.

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Um importante fenômeno físico, com várias aplicações tecnológicas,é o conhecido efeito Doppler. Face a sua importância, esseé um tema comum em praticamente todos os livros de ensino médio e superior. Não obstante,é um tema de difícil abordagem experimental, principalmente em escolas que não possuem um laboratório didático bem equipado. Neste trabalho, apresentamos um experimento didático, que permita a medida da frequência Doppler para ondas sonoras. Para tal, utilizamos como recursos didáticos aparelhos que fazem parte do cotidiano dos alunos, a saber, tablets, smartphones e softwares livres. Acreditamos que a utilização destes aparelhos torna a proposta de "baixo custo"e acessível a grande parte das escolas brasileiras. Palavras-chave: Efeito Doppler, experimento de baixo custo, tablets e smartphones.An important physical phenomena, with many technology applications, is the Doppler effect. In view of its importance, this is a common subject in high school or college books. However, it is a subject of difficult experimental approach, mainly in schools that do not have a well equipped teaching laboratory. In this paper, we present a didactic experimental, that enable the measure of Doppler effect for sound waves. We use as didactic resources devices that are part of daily life of students, namely, tablets and smartphones. We believe that the use of these devices makes this a "low cost" proposal and accessible of the most Brazilians schools. Keywords: Doppler effect, low cost experiment, tablets and smartphones. IntroduçãoNosúltimos anos o ensino de física vem enfrentando um de seus maiores desafios: sua prática para uma geração de estudantes imersos na tecnologia e na facilidade de acessoà informação. A sala de aula atual na disciplina de física em qualquer segmento de ensino pode ser considerada a materialização do desafio citado. Neste sentido, abordagens que envolvam tecnologias de informação e comunicação (TIC's) tem grandes chances de despertar o interesse e, sobretudo, facilitar o diálogo entre professores e alunos [1,2]. Atualmente, muitos trabalhos têm explorado novas tecnologias para auxiliarà aprendizagem no ensino de física, podemos citar, trabalhos de modelagem computacional [3][4][5], simulação * Endereço de correspondência: wagner.balthazar@ifrj.edu.br.e experimentos virtuais [6][7][8][9], softwares [10-12] e vídeo-análise [13,14]. O uso de smartphones e tablets como instrumentos de medidas associadosà experimentação também tem sido investigados [15][16][17][18]. Esses recursos didáticos, quando utilizados em sala de aula, podem contribuir para enriquecer a abordagem didática e o processo ensino-aprendizagem.Os Parâmetros Curriculares Nacionais do Ensino Médio [19] trazem diretrizes para o ensino das ciências que valorizam a compreensão da natureza e as tecnologias, visando a inserção do educando na sociedade de forma a promover um exercício crítico da cidadania. Assim, temas que envolvem aplicações tecnológicas importantes são mais potencialmente significativos para os alunos. O efeito Doppler (ED...

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“…Vieira et al [20] carried out a first approach to the use of a smartphone's ambient light sensor to describe the variation of light intensity with the inverse-square law of distance. Using this physics law, our group [15] has characterized the variation of light intensity to describe simple harmonic and damped oscillatory motion with the ambient light sensor.…”

Section: Introductionmentioning

confidence: 99%

Determining the efficiency of optical sources using a smartphone’s ambient light sensor

et al. 2016

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This work reports the use of a smartphone's ambient light sensor as a valuable tool to study and characterize the efficiency of an optical source. Here, we have measured both luminous efficacy and efficiency of several optical sources (incandescent bulb and halogen lamp) as a function of the electric power consumed and the distance to the optical detector. The illuminance of LEDs as a function of the distance to the optical detector is characterized for different wavelength emissions. Analysis of the results confirms an inverse-square law of the illuminance with the detector-source distance and shows good agreement with values obtained by classical experiments. This experience will trigger awareness in students in terms of sustainability, light propagation and efficiency of different optical sources.

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Demonstração da lei do inverso do quadrado com o auxílo de um tablet/smartphone

Cited by 14 publications

References 4 publications

Measurement of the magnetic field of small magnets with a smartphone: a very economical laboratory practice for introductory physics courses

Measurement of the magnetic field of small magnets with a smartphone: a very economical laboratory practice for introductory physics courses

Efeito Doppler com tablet e smartphone

Determining the efficiency of optical sources using a smartphone’s ambient light sensor

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