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Anno XXIV - n.4 - ottobre/dicembre 1991 Una misura didattica del flusso di energia radiante
In this article radiant energy flux is measured referring the temperature of a small blackened body to the temperature of a similar reflecting body. The reliability of the method is checked using electric lamps of different power output. Then the apparatus is used for measuring the efficiency of a solar cell, […]
Anno XXIV - n.4 - ottobre/dicembre 1991 La propagazione rettilinea della luce: una unità didattica per la scuola media
This is a detailed report of the study of the basic properties of light propagation with a middle-school class of 12 year pupils. It required about 20 hours of classroom time. The pupils performed experiments on the linear propagation of light and on the reflection on plane and concave mirrors using simple apparatus. […]
Anno XXIV - n.4 - ottobre/dicembre 1991 Quattro masse e una bilancia
The article presents the solution of an old problem about a pair of scales, known to be inaccurate, and four unknown masses. […]
Anno XXIV - n.4 - ottobre/dicembre 1991 Apparecchiatura, costruita in laboratorio scolastico, per la determinazione della costante di Planck tramite l’effetto fotoelettrico
We built a cheap apparatus for measuring Planck’s constant through the photoelectric effect. The measurements are performed in the usual way: for each wavelength of the incident light the maximum energy of the photoelectrons is found by stopping them with an electric potential. […]
Anno XXIV - n.4 - ottobre/dicembre 1991 Interfaccia cronometro per personal computer
A time-measuring device that can be connected to any MS-DOS PC through the standard CENTRONICS parallel printer’s connector is described. The start-stop sensors can be either electromechanical or electronic. A dedicated software controls the device’s operation and status. […]
Anno XXIV - n.4 - ottobre/dicembre 1991 Specchi e simmetrie
Bonacini Prize first prize entry. Simple experiments on multiple reflection allowed the pupils of a middle-school class to find the relationship between the number of images and the angle between two upright plane mirrors. The project finished with the construction of a caleidoscope. […]
Anno XXIV - n.4 - ottobre/dicembre 1991 Le giornate “Informatique et Pedagogie des Sciences Physiques” in Francia
Information about the French biennial Conferences on Computers in physical science teaching. […]
Anno XXIV - n.3 - luglio/settembre 1991 La pressione della luce
The idea that light produces pressure evolved through a series of adoptions and rejections, from the hypothesis of Newton to the experiment of Lebedev, depending on the theory used to describe the nature of light. This article reviews the history of this development. […]
Anno XXIV - n.3 - luglio/settembre 1991 Il problema del nucleare e la scuola: un’ulteriore indagine
In order to inquire about knowledge and awareness of young people about the risks connected with the uses of ionizing radiation, we have submitted to various groups of first year university students a questionnaire. Results obtained are examined, also on the light of the different types of secondary school previously attended. […]
Anno XXIV - n.3 - luglio/settembre 1991 Modello per la risoluzione di un problema di fisica a livello di studenti universitari (Traduzione da The Physics Teacher, aprile 1990 a cura di C. Marchi Trevisi)
The exercise described in this article incorporates several features noteworthy of a physics problem and may serve as a model for creating other exercises. A wooden rod is free to rotate in a vertical plane around its upper end, with its lower end dipping into water. […]
Anno XXIV - n.3 - luglio/settembre 1991 La relazione di laboratorio
Can we assume that a good lab report should contain some typical features? This is an attempt to settle the question in the case of practical work based on hypothetical-deductive methods. […]
Anno XXIV - n.3 - luglio/settembre 1991 Trasformazioni energetiche nella catapulta romana (Scuola media statale “F. B. Busoni”, Empoli FI)
This article describes an entry to the Bonacini Annual Contest for experimental work in the school. The pupils built a model of an ancient roman catapult and measured its elastic constant and the projectile’s initial velocity. At the end the efficiency of the energy transfer was evaluated from the energy balance of the machine. […]