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Title: A handheld LED coloured-light mixer for students to learn collaboratively the primary colours of light
Authors: Suchai Nopparatjamjomras
Ratchapak Chitaree
Bhinyo Panijpan
Mahidol University
Keywords: Physics and Astronomy;Social Sciences
Issue Date: 23-Jul-2009
Citation: Physics Education. Vol.44, No.2 (2009), 123-128
Abstract: To overcome students' inaccurate prior knowledge on primary additive colours, a coloured-light mixer has been constructed to enable students to observe directly the colours produced and reach the conclusion by themselves that the three primary colours of light are red, green, and blue (NOT red, yellow, and blue). Three closely packed tiny light-emitting diodes (LEDs) producing primary colours are combined with green intensity varying circuitry to generate the standard colour-triangle secondary colours and various shades ranging from yellow to orange and pale blue to cyan. In the laboratory, students worked collaboratively, predicting, observing and explaining, and finally discussing until there was a consensus. © 2009 IOP Publishing Ltd.
ISSN: 13616552
Appears in Collections:Scopus 2006-2010

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