Distance learning: an interdisciplinary experiment on Rayleigh scattering
As a result of social distancing measures in response to the Covid-Sars 2 pandemic, our school sent chemistry kits to the students’ homes for remote experimentation. This allowed the performance of ∼25 experiments per person in each of the Fall 2020 and Spring 2021 semesters in an elective chemistry...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2022-07-01
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| Series: | Chemistry Teacher International |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/cti-2022-0006 |
| _version_ | 1798042959679062016 |
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| author | Pérez-Vallejo Hortensia Natalia Contreras-Ruiz Marco Antonio Ibanez Jorge G. |
| author_facet | Pérez-Vallejo Hortensia Natalia Contreras-Ruiz Marco Antonio Ibanez Jorge G. |
| author_sort | Pérez-Vallejo Hortensia Natalia |
| collection | DOAJ |
| description | As a result of social distancing measures in response to the Covid-Sars 2 pandemic, our school sent chemistry kits to the students’ homes for remote experimentation. This allowed the performance of ∼25 experiments per person in each of the Fall 2020 and Spring 2021 semesters in an elective chemistry course. Students were requested to design some experiments of their own and then have the entire group reproduce them. One such experiment consisted of the anodic indirect electrogeneration of colloidal sulfur by solution acidification to produce thiosulfate disproportionation. This was evidenced by the well-known Rayleigh scattering phenomenon. Here, the trajectory and polarization state of light are modified by its interaction with a medium containing particles of smaller diameter than the wavelengths of incident light. If white light interacts with this medium, the smaller wavelengths (e.g., blue, violet) are radially scattered while the longer wavelengths (e.g., orange, red) pass through the suspension. Such scattering is responsible for beautiful sunsets and blue skies and is produced here by an indirect electrochemical process that generates colloidal sulfur. Students evidence the scattering of light shone from simple cell phone flashlights. The entire procedure is performed in a 2-h class session. Key student outcomes are presented. |
| first_indexed | 2024-04-11T22:42:47Z |
| format | Article |
| id | doaj.art-b750339dcaaf47fe9d026cf32e2620e9 |
| institution | Directory Open Access Journal |
| issn | 2569-3263 |
| language | English |
| last_indexed | 2024-04-11T22:42:47Z |
| publishDate | 2022-07-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Chemistry Teacher International |
| spelling | doaj.art-b750339dcaaf47fe9d026cf32e2620e92022-12-22T03:58:55ZengDe GruyterChemistry Teacher International2569-32632022-07-014218519010.1515/cti-2022-0006Distance learning: an interdisciplinary experiment on Rayleigh scatteringPérez-Vallejo Hortensia Natalia0Contreras-Ruiz Marco Antonio1Ibanez Jorge G.2Physics and Mathematics, Universidad Iberoamericana, Ciudad de Mexico, CDMX, MexicoDivision of Didactics and Educational Accompaniment, Universidad Iberoamericana, Ciudad de Mexico, CDMX, MexicoDepartment of Chemical, Industrial, and Food Enginering, Universidad Iberoamericana, Prol. Reforma 880, Lomas de Santa Fe, Del. Alvaro Obregon, 01219, Ciudad de Mexico, CDMX, MexicoAs a result of social distancing measures in response to the Covid-Sars 2 pandemic, our school sent chemistry kits to the students’ homes for remote experimentation. This allowed the performance of ∼25 experiments per person in each of the Fall 2020 and Spring 2021 semesters in an elective chemistry course. Students were requested to design some experiments of their own and then have the entire group reproduce them. One such experiment consisted of the anodic indirect electrogeneration of colloidal sulfur by solution acidification to produce thiosulfate disproportionation. This was evidenced by the well-known Rayleigh scattering phenomenon. Here, the trajectory and polarization state of light are modified by its interaction with a medium containing particles of smaller diameter than the wavelengths of incident light. If white light interacts with this medium, the smaller wavelengths (e.g., blue, violet) are radially scattered while the longer wavelengths (e.g., orange, red) pass through the suspension. Such scattering is responsible for beautiful sunsets and blue skies and is produced here by an indirect electrochemical process that generates colloidal sulfur. Students evidence the scattering of light shone from simple cell phone flashlights. The entire procedure is performed in a 2-h class session. Key student outcomes are presented.https://doi.org/10.1515/cti-2022-0006colloidsdistance learningelectrochemistryrayleigh scattering |
| spellingShingle | Pérez-Vallejo Hortensia Natalia Contreras-Ruiz Marco Antonio Ibanez Jorge G. Distance learning: an interdisciplinary experiment on Rayleigh scattering Chemistry Teacher International colloids distance learning electrochemistry rayleigh scattering |
| title | Distance learning: an interdisciplinary experiment on Rayleigh scattering |
| title_full | Distance learning: an interdisciplinary experiment on Rayleigh scattering |
| title_fullStr | Distance learning: an interdisciplinary experiment on Rayleigh scattering |
| title_full_unstemmed | Distance learning: an interdisciplinary experiment on Rayleigh scattering |
| title_short | Distance learning: an interdisciplinary experiment on Rayleigh scattering |
| title_sort | distance learning an interdisciplinary experiment on rayleigh scattering |
| topic | colloids distance learning electrochemistry rayleigh scattering |
| url | https://doi.org/10.1515/cti-2022-0006 |
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