ultimo numero della rivista Anno XXIX - n.1 - gennaio/marzo 1996
Cultura

L’entropia tra disordine e ignoranza. Nascita e sviluppo della prospettiva informazionale in fisica

At the turn of the century, a new approach to science gradually emerged. In this “information approach”, science is not a description of world in itself, but a coding of the information scientists have about the world. This approach was born inside statistical mechanics from the effort of giving a microscopic interpretation of entropy. […]

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ultimo numero della rivista Anno XXVIII - n.4 - ottobre/dicembre 1995
Cultura

L’esperimento delle due fenditure nella comprensione della meccanica quantistica

Different versions of the two slits experiment are investigated, pointing out the peculiar difficulties of its didactic presentation, and the conceptual misunderstandings that a superficial reading of the experience can lead to. […]

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ultimo numero della rivista Anno XXIV - n.3 - luglio/settembre 1991
Cultura

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. […]

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ultimo numero della rivista Anno XXV - n.2 - aprile/giugno 1992
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Cultura

La Relatività Generale di Einstein nel suo sviluppo storico

A detailed historical analysis of the development of Einstein’s Generai Relativity from 1907, year of his first paper on gravitation, to 1915, the conclusive year of his work, shows that the turning point of the development was the transformation of the classical gravitational theory into a Riemanian theory of space-time. […]

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ultimo numero della rivista Anno XXIX - n.2 - aprile/giugno 1996
Cultura

La scoperta della superfluidità

Superfluidity and superconductivity have strong analogies to each other. Why then did over a quarter of a century passed between the discoveries of these two phenomena? […]

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ultimo numero della rivista Anno XXIX - n.1 - gennaio/marzo 1996
Cultura

La torre di Babele

We received a very interesting document from historic point of view, that, if authentic, would witness for an extraordinary development of ancient Babylonian physics, never before supposed by historians of science. “Fisica nella scuola” does not take any position about document’s authenticity and only publishes its translation, […]

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ultimo numero della rivista Anno XXVII - n.4 - ottobre/dicembre 1994
Cultura

Legge e caso alle origini della fisica contemporanea

The European culture at the turn of the century developed a deep criticism of the concept of “natural laws”. In the meantime, the new concept of “statistical law” was found to be useful and fruitful. The paper proposes a review of the positions on this issue of the physicists and philosophers like Boltzmann, […]

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ultimo numero della rivista Anno XXIII - n.1 - gennaio/marzo 1990
Cultura

Meccanica quantistica ed evoluzione nei rapporti tra Fisica e Matematica all’inizio del XX secolo

The paper deals with a sort of discrepancy between the historical development of Quantum Mechanics and the way it is generally taught. Quantum Mechanics is usually presented after its fundamental postulates, while this is not easy to connect to the real historical evolution of the basic ideas. […]

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ultimo numero della rivista Anno XLVIII - n.2 - aprile/giugno 2015
Cultura

Metrologia e Correlazioni Quantistiche

Noise is unavoidable in measurements and limits their final precision. In particular, when quantization of carriers is involved, as for photons in electromagnetic fields or electrons in electric currents, a minimal noise is present: the Shot noise. Recently INRiM researchers have experimentally demonstrated how Shot noise can be beaten, […]

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ultimo numero della rivista Anno XXX - n.3 - luglio/settembre 1997
Cultura

SFM: Microscopia a scansione di forza

A brief introduction to scanning probe microscopes and electron scanning microscopes is followed by a description of the scanning force microscope operating principle, of its performance and limits; some SFM images of semiconductor samples are shown as examples of the potentialities of this technique. […]

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ultimo numero della rivista Anno XXIV - n.2 - aprile/giugno 1991
Cultura

Piccoli e grandi numeri in fisica

Numbers are often viewed as a matter for end-of-chapter problems. Actually numerical estimates of physical quantities are of utmost importance: significant examples of them should always accompany the discussion of physical laws. When is the measure of a physical quantity merely conventional, […]

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