Risultati della ricerca
Anno XXXIX - n.1 - gennaio/marzo 2006 Correzioni alla legge di Stokes per la misura della viscosità di un liquido
The viscosity of a viscous medium can be found by measuring the terminal velocity of small falling spheres and applying Stokes’ law. The experiment is didactically interesting and easily performed in school, but because of the finiteness of the medium edge effects produce theoretical and experimental difficulties. […]
Anno XXXIX - n.1 - gennaio/marzo 2006 Miopia in età scolare e visione da vicino
This work considers the experimental evidence of the eye growth from visual signals. There is presented an eye model in which both the power of the lens and the distance lens-screen can be varied in order to show the accommodation and the elongation that the eye would become because of continual near vision. […]
Anno XXXVIII - n.4 - ottobre/dicembre 2005 La relatività generale: mezzo secolo di successi dopo una lunga fase di stanca
After a first period of successful observations, e.g. Eddington’s 1919 observation of the deviation of light in the gravitational field of the Sun, the interest in general relativity (GR) was low for many years. The foreseen effects were too small to be measured with available instruments. […]
Anno XXXVIII - n.4 - ottobre/dicembre 2005 Un’intervista a Einstein
Two weeks before Einstein died he was visited by a historian of science. They sat in Einstein’s study and discussed some of his illustrious predecessors in the evolution of physics. […]
Anno XXXVIII - n.4 - ottobre/dicembre 2005 L’equazione di bilancio dell’energia e dell’entropia
In this paper we present a discussion of the first and the second law of thermodynamics based on the balance equation for energy and entropy. In the second part we illustrate some didactical advantages of this approach. […]
Anno XXXVIII - n.4 - ottobre/dicembre 2005 Il sistema educativo nei Paesi Bassi e il problema dell’insegnamento delle scienze – Il sistema educativo
At the start of the 21st century the teaching and learning of science for a responsible citizenship is an issue of concern in many countries. The Dutch approach to the problem in the context of a general reform of the school system is reported. […]
Anno XXXVIII - n.4 - ottobre/dicembre 2005 Il sistema educativo nei Paesi Bassi e il problema dell’insegnamento delle scienze – Verso l’educazione scientifica per la cittadinanza
In molte scuole olandesi molti studenti non apprezzano le materie scientifiche e questo potrebbe spiegare la diminuzione del numero di quelli che ?scelgono opzioni scientifiche o tecnologiche?. Finora i tentativi di migliorare la situazione non hanno prodotto risultati soddisfacenti. In questo articolo si illustra dapprima una procedura per costruire la cosiddetta Educazione Scientifica basata sul Contesto partendo dagli obiettivi generali del programma. […]
Anno XXXVIII - n.3 - luglio/settembre 2005 Preludio alla bomba
The discovery and the theoretical explanation of the fission of uranium were published at the beginning of 1939: the same year that saw the start of World War 2. Many physicists who had emigrated to the US to escape the horrors of nazism felt the duty to participate in the construction of the first nuclear weapon. […]
Anno XXXVIII - n.3 - luglio/settembre 2005 “Interazione della radiazione con la materia” – Un modulo integrativo di fisica
A short unit on the interaction of radiation with the matter is proposed for student of the last years of the secondary school. The course has two aims: to form citizens with an enhanced knowledge in this field and to help the students to choose their future course of studies. […]