By: EMBI6 on Sabato 03 Maggio 2014 12:39
@ invidio coloro che hanno la capacità di capire, ma hanno mantenuto l'umiltà per apprendere:
[...]The suggestion that nuclear energy could be transferred to an atomic lattice is usually dismissed (contemptuously, I might add) because of the great disparity between atomic and nuclear energy scales; of the order 107, say. It is, therefore, of great psychological importance that one can point to a phenomenon in which the transfer of energy between different scales involves-- and here I quote - a focusing or amplification of about eleven orders of magnitude.”
[...] The first hint of coherent SL occurred in 1970 when SL was observed without accompanying cavitation noise. This indicates that circumstances exist in which bubbles are stable. But not until 1990 was it demonstrated that an SL stream of light could be produced by a single stable cavity.
[...] The first hint of coherent SL occurred in 1970 when SL was observed without accompanying cavitation noise. This indicates that circumstances exist in which bubbles are stable. But not until 1990 was it demonstrated that an SL stream of light could be produced by a single stable cavity.
What, to the naked eye, appears as a steady, dim blue light, a photomultiplier reveals to be a clock-like sequence of pulses in step with the sonic period, which is of the order of 10-4 seconds.
Each pulse contains about 105 photons, which are emitted in less than 50 pico seconds, that is, in about 10-11 seconds. When I first heard about coherent SL, some months ago, my immediate reaction was: This is the dynamical Casimir effect. The static Casimir effect, as usually presented, is a short-range non-classical attractive force between parallel conducting plates situated in a vacuum. Related effects appear for other geometries, and for dielectric bodies instead of conductors.
[…]The mechanisms that have been suggested for cold fusion and sonoluminescence are quite different. But they both depend significantly on nonlinear effects. Put in that light, the failures of naive intuition are understandable.
So ends my Progress Report.
http://e-cataustralia.com/files/pdf/Julian_Schwinger-A_Progress_Report.pdf