37 research outputs found
Nietzsche for physicists
One of the most important philosophers in history, the German Friedrich
Nietzsche, is almost ignored by physicists. This author who declared the death
of God in the 19th century was a science enthusiast, especially in the second
period of his work. With the aid of the physical concept of force, Nietzsche
created his concept of will to power. After thinking about energy conservation,
the German philosopher had some inspiration for creating his concept of eternal
recurrence. In this article, some influences of physics on Nietzsche are
pointed out, and the topicality of his epistemological positionthe
perspectivismis discussed. Considering the concept of will to power, I
propose that the perspectivism leads to an interpretation where physics and
science in general are viewed as a game.Comment: 14 pages. Version 3 with improvements, corrections. Accepted in
Philosophia Scientia
Constraining the tidal charge of brane black holes using their shadows
A constraint on the tidal charge generated within a brane world is shown.
Using the shadow of a rotating black hole in a brane context in order to
describe the M87* parameters recently announced by the Event Horizon Telescope
Collaboration, the deviation from circularity of the reported shadow produces
an upper bound on the bulk's nonlocal effect, which is conceived of as a tidal
charge in the four-dimensional brane induced by the five-dimensional bulk.
Therefore, a deviation from circularity leads to an upper bound
on the tidal charge .Comment: 9 pages, 2 figures, 1 table. V2 with minor changes and new
references. Published in The European Physical Journal
Geometrization 3.0: the black hole shadow
There have been three geometrizations in history. The first one is
historically due to the Pythagorean school and Plato, the second one comes from
Galileo, Kepler, Descartes and Newton, and the third is Einstein's
geometrization of nature. The term geometrization of nature means the
conception according to which nature (with its different meanings) is massively
described by using geometry. In this article, I focus on the third
geometrization, in which the black hole shadow phenomenon provides an
interesting statement about the level of geometrization achieved by the theory
of general relativity. With the black hole shadow described by the Einsteinian
theory, the geometrical interpretation of nature relates shape to dynamics or,
more specifically, the shadow silhouette to the angular momentum, regardless
the matter content inside the black hole. As a consequence, spacetime symmetry
could play the role of the formal cause in black hole physics.Comment: 18 pages, 3 figures, 1 tabl