Risultati della ricerca
Anno XXXI - n.4 - ottobre/dicembre 1998 Quantizzazione della conduttanza in contatti d’oro unidimensionali
Using a very easy experiment, conductivity quantization can be observed. In this way quantum mechanics becomes something students can also experiment. […]
Anno XXXI - n.3 - luglio/settembre 1998 Sperimentazione didattica dell’ipertesto multimediale “Dentro l’Atomo”
The multimedial software “Inside the Atom” introduces atomic structure through an historical perspective. A test was carried out with fourth year students of a scientific highschool aimed at: (1) finding what difference in learning was achieved by using the software, with respect to traditional practice; […]
Anno XXXI - n.3 - luglio/settembre 1998 Che cosa ci insegnano i fenomeni di luce ed ombra sulla luna
Already in ancient times the observation of lunar phases and eclipses allowed to speculate on the distances of sun and moon and to estimate the moon’s dimensions. The article, based on the writings of Aristarchus, shows how the phenom-enological observations can lead to a comprehensible general atronomical view of the Earth, […]
Anno XXXI - n.3 - luglio/settembre 1998 Sull’orbita della luna
Understanding what the orbit of the Moon look like when viewed from the reference frame of the Sun presents some difficulties to highschool students. The approach described in this paper to the correct representation of the Moon’s trajectory is an example of how a physics problem can be schematized an simplified. […]
Anno XXXI - n.3 - luglio/settembre 1998 Una diversa soluzione del problema proposto nell’articolo “Chi ha ragione?” della rubrica “Intermezzo” de “La Fisica nella Scuola”
This article presents another solution of a problem proposed in the review (LFNS, 4,1996). […]
Anno XXXI - n.3 - luglio/settembre 1998 Misura della costante h/e (costante di Planck/carica elementare) mediante diodi L.E.D.
By means of some LEDs (Light Emitting Diodes) used as quasi-monochromatic light sources at different wavelengths and measuring their forward voltage at a fixed value of the current one can obtain the ratio of Planck’s constant to elementary charge with an estimated error of the order of 6%. […]
Anno XXXI - n.3 - luglio/settembre 1998 Alcuni accorgimenti per minimizzare le cause di errore in una esperienza sulla conservazione dell’energia
In this article we propose a classic experiment dealing with the conservation of energy. The device we describe allows a strong reduction of uncertainties in evaluating the thermal energy produced by a resistor in which an electrical current flows. […]
Anno XXXI - n.3 - luglio/settembre 1998 Una geometria alternativa per la definizione operativa del vettore induzione magnetica B
The article describes some experiments, with a new geometrical approach, on the relationship between the magnetic force on a conductor, electric current and length. […]
Anno XXXI - n.3 - luglio/settembre 1998 Una bambola che cambia colore
A simple to make but not so simple to explain experiment on polarized light is described and explained. […]