A little knowledge is a dangerous thing: understanding of rectilinear propagation vs. diffraction of light - Archive ouverte HAL
Conference Papers Year : 2020

A little knowledge is a dangerous thing: understanding of rectilinear propagation vs. diffraction of light

Abstract

The study aims to identify the participants’ representations of light and its propagation from a primary source through the closed space of a black box and in the absence of multiple diffusion and reflection. The elements of explanation then involve two distinct notions: that light propagates in a straight line; and the necessity for the light to reach the eye in order to be seen. Counter-intuitively enough, in both countries, the percentage of correct answers decreases in a similar way as primary school school children grow up, to become a small minority among students at university (11% in Romania and 16 to 27% in France). Percentage of correct drawings among adults varies between 11% (Romanian future primary school teachers) and 27%. Comparaison with their written explanations reveals an excellent concordance.
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Dates and versions

hal-02510382 , version 1 (17-03-2020)

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  • HAL Id : hal-02510382 , version 1

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Estelle Blanquet, Violette Blé, Claire Darraud, Fabienne Goldfarb, Manuela Miron, et al.. A little knowledge is a dangerous thing: understanding of rectilinear propagation vs. diffraction of light. 2020 NARST Conference, NARST, Mar 2020, Portland, United States. ⟨hal-02510382⟩
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