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Albert Einstein (/ ˈ aɪ n s t aɪ n /, EYEN-styne; [4] German: [ˈalbɛʁt ˈʔaɪnʃtaɪn] ⓘ; 14 March 1879 – 18 April 1955) was a German-born theoretical physicist who is best known for developing the theory of relativity. Einstein also made important contributions to quantum mechanics.
Einstein, Albert (1956) [1922]. The Meaning of Relativity (5 ed.). Princeton University Press. The Meaning of Relativity Albert Einstein: Four lectures delivered at Princeton University, May 1921; How I created the theory of relativity Albert Einstein, 14 December 1922; Physics Today August 1982; Relativity Sidney Perkowitz Encyclopædia Britannica
Einstein's solution was to discard the notion of an aether and the absolute state of rest. In relativity, any reference frame moving with uniform motion will observe the same laws of physics. In particular, the speed of light in vacuum is always measured to be c , even when measured by multiple systems that are moving at different (but constant ...
In Einstein's theory, it turns out to be impossible to find a general definition for a seemingly simple property such as a system's total mass (or energy). The main reason is that the gravitational field—like any physical field—must be ascribed a certain energy, but that it proves to be fundamentally impossible to localize that energy.
Einstein believed the problem of God was the "most difficult in the world"—a question that could not be answered "simply with yes or no". He conceded that "the problem involved is too vast for our limited minds". [11] Einstein explained his view on the relationship between science, philosophy and religion in his lectures of 1939 and 1941:
The Meaning of Relativity: Four Lectures Delivered at Princeton University, May 1921 is a book published by Princeton University Press in 1922 that compiled the 1921 Stafford Little Lectures at Princeton University, given by Albert Einstein.
She ends up being tapped for the Chinese government's secret project to make contact with extraterrestrials. Ye, using her own ingenuity, comes up with a way to transmit the radar's signal further ...
Einstein's version of the experiment [15] presumed that one observer was sitting midway inside a speeding traincar and another was standing on a platform as the train moved past. As measured by the standing observer, the train is struck by two bolts of lightning simultaneously, but at different positions along the axis of train movement (back ...