Petra Dunkel*, Bence Kontra, Barnabás Gere, Vuong Tran and Zoltán Kaleta*,
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Who Has the Winning Ticket? A Radiant Raffle Demonstration
A simple demonstration adaptable to classroom conditions is presented, which involves the preparation of raffle tickets using filter paper and the solution of selected fluorophores. With an appropriate dilution, the text written on the tickets is not visible to the naked eye; however, it becomes readable once put under a UV lamp. Besides being a conventional game of raffles with small giveaways, the activity can captivate and raise the spectators’ interest in a specific chemical phenomenon. Optionally, depending on the audience, the demonstration can be supplemented by an explanation of fluorescence, the presentation of some of the most important fluorophores, and a discussion of their applications.
期刊介绍:
The Journal of Chemical Education is the official journal of the Division of Chemical Education of the American Chemical Society, co-published with the American Chemical Society Publications Division. Launched in 1924, the Journal of Chemical Education is the world’s premier chemical education journal. The Journal publishes peer-reviewed articles and related information as a resource to those in the field of chemical education and to those institutions that serve them. JCE typically addresses chemical content, activities, laboratory experiments, instructional methods, and pedagogies. The Journal serves as a means of communication among people across the world who are interested in the teaching and learning of chemistry. This includes instructors of chemistry from middle school through graduate school, professional staff who support these teaching activities, as well as some scientists in commerce, industry, and government.