| 1. |
- Haglund, Jesper, 1973-, et al.
(författare)
-
University physics students’ ideas of thermal radiation expressed in open laboratory activities using infrared cameras
- 2017
-
Ingår i: Research in Science & Technological Education. - : Routledge. - 0263-5143 .- 1470-1138. ; 35:3, s. 349-367
-
Tidskriftsartikel (refereegranskat)abstract
- BackgroundUniversity physics students were engaged in open-ended thermodynamics laboratory activities with a focus on understanding a chosen phenomenon or the principle of laboratory apparatus, such as thermal radiation or a heat pump. Students had access to handheld infrared (IR) cameras for their investigations.PurposeThe purpose of the research was to explore students’ interactions with reformed thermodynamics laboratory activities. It was guided by the research question: How do university physics students make use of IR cameras in the investigation of the interaction of thermal radiation?SampleThe study was conducted with a class of first-year university physics students in Sweden. The interaction with the activities of four of the students was selected for analysis. The four students are males.Design and methodsWe used a qualitative, interpretive approach to the study of students’ interaction. The primary means of data collection was video recording of students’ work with the laboratory activities and their subsequent presentations. The analysis focused on how IR cameras helped students notice phenomena relating to thermal radiation, with comparison to previous research on students’ conceptions of thermal radiation.ResultsWhen using the IR camera students attended to the reflection of thermal radiation on shiny surfaces, such as polished metals, windows or a white-board, and emissive properties of surfaces of different types. In this way, they went beyond using the technology as a temperature probe. Students were able to discuss merits and shortcomings of IR cameras in comparison with digital thermometers.ConclusionsWith the help of IR cameras, university physics students attend to thermal phenomena that would otherwise easily go unnoticed.
|
|
| 2. |
- Melander, Emil, et al.
(författare)
-
More than meets the eye : Infrared cameras in open-ended university thermodynamics labs
- 2016
-
Ingår i: Physics Teacher. - : American Association of Physics Teachers (AAPT). - 0031-921X .- 1943-4928. ; 54:9, s. 528-531
-
Tidskriftsartikel (refereegranskat)abstract
- Educational research has found that students have challenges understanding thermal science. Undergraduate physics students have difficulties differentiating basic thermal concepts, such as heat, temperature, and internal energy. Engineering students have been found to have difficulties grasping surface emissivity as a thermal material property. One potential source of students’ challenges with thermal science is the lack of opportunity to visualize energy transfer in intuitive ways with traditional measurement equipment. Thermodynamics laboratories have typically depended on point measures of temperature by use of thermometers (detecting heat conduction) or pyrometers (detecting heat radiation). In contrast, thermal imaging by means of an infrared (IR) camera provides a real-time, holistic image. Here we provide some background on IR cameras and their uses in education, and summarize five qualitative investigations that we have used in our courses.
|
|
| 3. |
- Melander, Emil, et al.
(författare)
-
To see the invisible : open-ended university thermodynamics labs with infrared cameras
- 2015
-
Ingår i: Proceedings från 5:e Utvecklingskonferensen för Sveriges ingenjörsutbildningar. - Uppsala. ; , s. 35-37
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Thermal imaging with an infrared (IR) camera provides a real-time, holistic image of thermal energy transport. In this workshop, we engage with open-ended laboratory exercises where IR cameras give added value to the understanding of central concepts in second year university thermodynamics courses for physics and engineering students.
|
|
