Articoli rivista
Anno XXV - n.3 - luglio/settembre 1992 Una soluzione geometrica di un problema di ottica
A formula for calculating the index of refraction of a transparent plane parallel sheet is derived geometrically, the known quantities being the thickness of the sheet, the angle of the incident ray of light and the lateral displacement of the outgoing ray. […]
Anno XL - n.3 - luglio/settembre 2007 Una spazzola che cammina
We introduce a simple homemade toy, which can glide forward with no propellers, limbs, wheels, and seemingly no movement of any kind that can push forward against the ground. The toy arouses the pupils’ interest and their incentive to ask ‘Why’? […]
Anno XXXVII - n.1 - gennaio/marzo 2004 Una trattazione unitaria difenomeni “diversi”: il caso del modello esponenziale
This paper reports a teaching approach to physics, developed for high schools and pre-service teachers formation courses, focused on modelling physical phenomena described by similar mathematical equations in different fields of physics. We start by analysing the phenomena and finding the relevant physical variables. […]
Anno XXVII - n.2 - aprile/giugno 1994 Una verifica della legge della circuitazione di Ampère. (traduzione da Am. J. Phys., vol. 58, n. 6, giugno 1990, a cura di Giacomo Torzo)
Using a Hall probe and a coil fed by a constant current, the line integral Ampere’s law can be measured. A simple method to approximate the integral by a finite sum is reported. […]
Anno XXIX - n.2 - aprile/giugno 1996 Una versione moderna dell’esperimento di Fourier sulla conduzione termica entro un anello di metallo
This work deals with a famous historical experiment, i.e. the experiment that allowed Fourier to establish his theorem about the series expansion of a periodic function. In our experiment, that deals also with many aspects of the theory of heat, we warmed up an aluminium ring by means of a flame pointed towards a single point of the ring. […]