Articoli rivista
Anno XXVIII - n.3 - luglio/settembre 1995 Un’esperienza con differenze di potenziale variabili nel tempo
After introducing the concept of electric potential difference to students in the last year of secondary school, an experiment using a variable frequency generator, an oscilloscope and a loudspeaker allowed them to “see” and “hear” variable potential differences. The experiment was the starting point for an empirical introduction to decomposing electrical signals into sinusoidal components. […]
Anno XLIX - n.4 - ottobre/dicembre 2016 Un’esperienza di Alternanza Scuola Lavoro
The article is about a recent innovative experience of ‘work-related learning’ which took place in the school year 2015-2016 and involved a third class of Liceo Cecioni, a high school with a scientific specialization. The whole class was involved simultaneously. Our students were equipped with a professional accelerometer VectorNav VN-100: starting from the time series containing the three-axis accelerometer measurements they had to reconstruct, […]
Anno XXXV - n.4 - ottobre/dicembre 2002 Un’esperienza interessante in 1ª C¹ ovvero le straordinarie virtù di una molla giocattolo
Several experiments with the Slinky lend themselves to an analysis in terms of energy that is rigorous and easily comprehensible at the highschool level. […]
Anno XXVI - n.4 - ottobre/dicembre 1993 Un’esperienza sul campionamento di un segnale.
Exploring signal sampling techniques through an optical experiment. The reconstruction of an optical image of a simple pattern matched to a diffraction grating is proposed as an example of data analysis by digital method. Correspondence between analysis of time dependent digital signals and of spatial digital functions is outlined. […]
Anno LI - n.2 - aprile/giugno 2018 Un esperimento “classico” rivisitato: la misura di h con i LED
A variation of the “classical” experiment for the measurement of Planck’s constant h using LEDs was proposed at the 2018 AI F Summer school of L’Aquila. This variation, in which the discharge of a capacitor provides the needed variable voltage and the measurements are made with an Arduino board, […]
Anno XXVIII - n.4 - ottobre/dicembre 1995 Un esperimento dimostrativo sul fenomeno della fotoconducibilità, cioè della diminuzione di resistenza elettrica di un semiconduttore indotta dalla luce
This experiment demonstrates the photoconductive effect for Si and Ge samples illuminated by quasi monochromatic light. The vanishing of the effect for longer wavelengths allows a qualitative estimation of the fotonductive threshold which is related to the energy gap of the material. […]