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Anno XLVII - n.4 - ottobre/dicembre 2014 Teorie fisiche: forma e sostanza. Un esempio
Beginning of the 19th century, aether and relativity: Lorentz was looking for space-time transformation rules fitting with the covariance of Maxwell?s equations under the change from aether to Earths reference frame. Meanwhile, Einstein was stating the identity of the laws of physics in any inertial frame and the rules of invariance of the speed of light in vacuum, […]
Anno XXXVIII - n.4 - ottobre/dicembre 2005 La relatività generale: mezzo secolo di successi dopo una lunga fase di stanca
After a first period of successful observations, e.g. Eddington’s 1919 observation of the deviation of light in the gravitational field of the Sun, the interest in general relativity (GR) was low for many years. The foreseen effects were too small to be measured with available instruments. […]
Anno XXXIII - n.3 - luglio/settembre 2000 Vedi alla voce quanto
A hundred years ago Max Planck introduced the quantum of action concept; the anniversary is celebrated in many ways all over the world. In the present paper we want to stress that the Planck constant h ‘initially introduced to account for some facts in a field of research which seemed a marginal one’ […]