Demonstration of light absorption and light scattering using smartphones

Malisorn, Khemchira; Wicharn, Surawut; Plaipichit, Suwan; Pipatpanukul, Chinnawut; Houngkamhang, Nongluck; Puttharugsa, Chokchai

doi:10.1088/1361-6552/ab51ea

“…This recording was done using a smart phone. Many researchers have used smartphones to conduct research [1,[17][18][19][20]. The collision is indicated by the sound of the collision of two pendulums.…”

Section: Methodsmentioning

confidence: 99%

Determine g using Lato Lato

Wibowo¹

2023

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We demonstrated the measurement of the Earth’s gravitational acceleration ( g ) by using Lato Lato, a popular children’s toy in Indonesia right now. We compared the obtained results with the value of the measured gravitational acceleration using a simple pendulum. The smart phone was used to record the videos of the experiment, and then we analysed the video to obtain the deviation angle (ϑ) and duration of the pendulum movement (t) of Lato Lato to determine g . The value obtained from the measurement using Lato Lato is ( 9.776 ± 0.007 ) m s−2, while 9.774 ± 0.048 m s−2 is obtained by using a simple pendulum. It shows that the accuracy levels of the two techniques are comparable. Therefore, Lato Lato can be used as a simple and low-cost experimental tool for measuring the acceleration due to gravity. It is supposed to become an addition to methods that are commonly used, such as a simple pendulum and a physical pendulum.

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“…A multimeter was used for measuring the voltage across the 1 KΩ resistor R. The voltages were measured for water and different concentrations of solution, and these values were used to calculate the absorbance using equation (2). A calibration curve was plotted to obtain the calibration constant k using equation (4).…”

Section: Methodsmentioning

confidence: 99%

“…The halogen lamp and digital luxmeter are used as the light source and the light sensor [3]. Recently smartphones were used for the light source as well as the light sensor [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

A Simple Colorimeter for Measuring the Concentration of Multicomponent Food Coloring

Soo

¹

,

Santosa

²

2022

J. Phys.: Conf. Ser.

1

0

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Built-in instruments are commonly employed in physics experiments. In this case, students are usually unaware of the instrument’s fundamental physics. Here we constructed a simple and compact colorimeter. A light-emitting diode (LED) was used as a light source. The light detector circuit consists of a photoresistor, a resistor, and a 9-V battery. During the experiment, we illuminated the solution of food coloring. The transmitted light was measured via the voltage in the resistor of the light detector to obtain the absorbance. The value was then used to determine the concentration of the solution. This instrument has been used to measure a mixture of food coloring’s concentration e.g. 1 ml/l Carmoisine and 1 ml/l Ponceau. For this sample, the measurement gave a concentration of 0.97 ml/l Carmoisine and 0.81 ml/l Ponceau. This instrument is simple and appropriate for teaching.

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“…Efficiencies of incandescent bulbs and halogen lamps as light sources were compared using a smartphone light sensor as a light meter [87]. Beer-Lambert's law was demonstrated by comparing the illuminance transmitted through the media [88][89][90][91]. The reduction in illuminance of light passing through water could be calibrated to determine the liquid turbidity [86].…”

Section: Smartphones In Studies Of Opticsmentioning

confidence: 99%

Smartphones as Smart Tools for Science and Engineering Laboratory: A Review

Sirisathitkul

¹

,

Sirisathitkul

²

2023

Iraqi Journal of Science

2

0

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This article reviews a decade of research in transforming smartphones into smart measurement tools for science and engineering laboratories. High-precision sensors have been effectively utilized with specific mobile applications to measure physical parameters. Linear, rotational, and vibrational motions can be tracked and studied using built-in accelerometers, magnetometers, gyroscopes, proximity sensors, or ambient light sensors, depending on each experiment design. Water and sound waves were respectively captured for analysis by smartphone cameras and microphones. Various optics experiments were successfully demonstrated by replacing traditional lux meters with built-in ambient light sensors. These smartphone-based measurements have increasingly been incorporated into high school and university laboratories. Such modernized science and engineering experimentations also provide a ubiquitous learning environment during the pandemic period.

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Demonstration of light absorption and light scattering using smartphones

Cited by 12 publications

References 13 publications

Determine g using Lato Lato

Determine g using Lato Lato

A Simple Colorimeter for Measuring the Concentration of Multicomponent Food Coloring

Smartphones as Smart Tools for Science and Engineering Laboratory: A Review

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