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Vor 7 Stunden · It is this quantum fluctuation of electromagnetic fields in the vacuum that "stimulates" the spontaneous emission of radiation by electrons in atoms. Dirac's theory was hugely successful in explaining both the emission and absorption of radiation by atoms; by applying second-order perturbation theory, it was able to account for the scattering of photons, resonance fluorescence and non ...
Vor 7 Stunden · Highly conductive PEDOT films were deposited on yarns in a continuous manner, such that the oxidant-impregnated yarn was fed into the oCVD reactor where the vapor of the corresponding monomer was polymerized to form a continuous film of PEDOT. A specially-designed elastomeric nozzle was used to allow for yarn to be fed directly from atmosphere into the vacuum chamber. Hence, a full-size ...
Vor einem Tag · Hypothetically, there could be an airship lifted by a vacuum—that is, by material that can contain nothing at all inside but withstand the atmospheric pressure from the outside. It is, at this point, science fiction, although NASA has posited that some kind of vacuum airship could eventually be used to explore the surface of Mars.
