An extensible model of the electron by Dirac

By Dirac

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Time dilation involves a discrepancy between the “proper time” of an observer moving along with something under study and the relative time of a second observer traveling at a different constant speed compared to the first. For example, suppose that the first observer is a passenger on a spaceship moving close to the speed of light. For that passenger, the time on the ship’s clock would be the proper time. However, if a second observer—the passenger’s sister on Earth, let’s say—somehow managed to see the clock (using a superpowerful telescope aimed at the ship’s large windows)—she would measure it to be moving slower.

Researchers had begun to probe possible causes of the extra radiation. Relevant to his work and ideally located in his home city, the late September conference was just perfect for him. He could listen to talks describing the latest findings about radioactivity, the atomic nucleus, and related topics. One such talk, by astrophysicist Werner Kolhörster of Halle, Germany, described balloon flights miles above the ground equipped with radiation detection equipment. Confirming earlier results by Austrian physicist Victor Hess, he reported how “penetrating radiation,” apparently from extraterrestrial sources, increases significantly at high altitudes.

Racing After Light While Schrödinger never had a chance to work with Boltzmann, he nevertheless found much meaning and achievement in his studies. He was clearly a star student. Einstein’s university life was marked by a different cause of disappointment: he did not have the opportunity to study the deep theoretical questions he was really interested in. Consequently, he did not take all of his classes as seriously as he should have, particularly his math courses, as they didn’t seem relevant to his intellectual passions.

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