Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.9801s&link_type=abstract
American Astronomical Society, 197th AAS Meeting, #98.01; Bulletin of the American Astronomical Society, Vol. 32, p.1572
Astronomy and Astrophysics
Astronomy
Scientific paper
It seems quite reasonable to assume that students have the prerequisite knowledge needed to begin to understand the role of light in our introductory astronomy courses. Most courses start assuming students are aware that vision is a passive process. Yet, our students' conceptions are similar to those held by the scientists of ancient Greece, in spite of a lifetime of experience with the phenomena of light and color. Our interviews with students and their answers to test questions have helped us understand the sequence of models that students move through on their way to scientific understanding of the interaction of light with matter. We have developed interventions that help them construct and test these models. Our methods include developing demonstrations that serve to confront and disprove misconceptions, creating devices to help students explore terrestrial spectra, employing qualitative questions for class discussion, and using a succession of models that increase in their cognitive demand and predictive power. We have found that the popular approach of using a wave model to describe light is counterproductive for most students, since a particle model explains most phenomena that they encounter.
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