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1 giorno fa · The media landscapes into which radio broadcasting emerged around a century ago are barely recognizable from the ones many people inhabit in the early twenty-first century. Though it would be a mistake to think of those landscapes as having been static or uniform, it might be safe to say that a stable characteristic was their population by discrete or periodical media texts.
6 ore fa · Definition and basic properties. General relativity is a metric theory of gravitation. At its core are Einstein's equations, which describe the relation between the geometry of a four-dimensional pseudo-Riemannian manifold representing spacetime, and the energy–momentum contained in that spacetime. [46]
Produced by Max and David Fleischer, best known for their Betty Boop and Superman cartoons, The Einstein Theory of Relativity used the power of animation to explain relativity to a broad, non-scientific audience in 1923. One of the first educational science films ever made, the silent ani ...
2 giorni fa · Special relativity is mathematically self-consistent, and it is an organic part of all modern physical theories, most notably quantum field theory, string theory, and general relativity (in the limiting case of negligible gravitational fields).
4 giorni fa · E = mc 2, equation in German-born physicist Albert Einstein’s theory of special relativity that expresses the fact that mass and energy are the same physical entity and can be changed into each other.
2 giorni fa · The Hanbury-Brown and Twiss effect in inflationary cosmological perturbations. Gustavo Matheus Gauy, Flavia Sobreira, Giorgio Torrieri. The simplest model of inflation is based around an inflaton field that starts in a coherent false vacuum state with a positive cosmological constant, rolls slowly to the true vacuum and relaxes to it via reheating.
3 giorni fa · Physical cosmology is the study of the formation and evolution of the universe on its largest scales. Albert Einstein's theory of relativity plays a central role in all modern cosmological theories.
