Arquivo para a ‘Física’ Categoria
Brazilian participate physical experience
29
Sep
An experiment that made mass precise measurements of particles and electric
charges, made in with ALICE (A Large Ion Collider Experiment), the detector of heavy ions in the Large Hadron Collider ring (LHC), confirmed the existence of a fundamental symmetry in nature, the result was published in Nature on 17 August this year.
The researchers include Brazilian researchers associated with the University of São Paulo (USP) and the University of Campinas (Unicamp), including Marcelo Gameiro Munhoz, professor at the Institute of Physics at USP (IF) who explained:
“After the Big Bang, for each particle of matter an antiparticle was created. In particle physics, an important question is whether all the laws of physics exhibit a specific type of symmetry known as CPT [charge, parity and time] and these measurements suggest that there is indeed a fundamental symmetry between cores and antinuclear “, the apparent asymmetry between matter and antimatter is one of the biggest problems without physical solution.
The power loss measurements on the projection time chamber allow the ALICE experiment to identify antinúcleos (curved upper left) and nuclei (curved upper right) produced in collisions of lead ions in the LHC (in picture).
Munhoz is the principal investigator of the research project “high-energy nuclear physics at RHIC and LHC”, supported by the Research Foundation of São Paulo (FAPESP).
The sun can take a nap
29
Jul
That’s what he told Valentina Zharkova scientist
at the University of Northumbria, a National Meeting of Astronomy in Lladudno, Wales.
Modern technology allows us to accurately predict solar cycles, and enough need Zharkova model indicates that solar output may drop by half between 2030 and 2040.
For a long time it was believed that solar activity was due to a system of fluid turbines that moved into the sun, but Zharkova and his team found that are fluctuating magnetic waves in two layers of the Sun, and studying the data from these double wave is that her team made very accurate predictions.
The period when sunspots are rare, are Maunder Minimum calls, and it is believed that he was the last time between 1645 and 1715, the period were observed about 50 sunspots, while normal is 40,000. The era was marked by brutally cold temperatures that froze rivers in Europe and North America, reaching record temperatures below -40º (Celsius).
This could cause a global climate change, but Valentina in an interview with USA Today, disputed that link and emphasized that their research has touched on the possibility of climate change, only a cooler period.
Mystery, particles and cosmos
11
May
The objectivist pragmatism that sees being separated into subject and object, can not see beyond
the navel of the self, although browse by categories such as “individualism”, “ethics”, “consciousness” (or disposal which is the same) is himself unaware of their lack of beyond, the meta-physical, as the physical (physis) basis of their objectivity, alienated being trans- formed into subject (subjectivity) or canceled it completely in a homo sacer (Agamben).
Looking to infinity and the mystery, but not solve the problem, it helps to think we do not know everything that cynical reason (Sloterdijk) did not explain everything, or rather explained almost nothing and that life and still be there in the Dasein of the crisis of modernity.
Two events help us to look at this mystery, if only in comfortable field of objectivity, look for the infinite universe where even the man does not see and the interior of the particle where the man sees but does not understand the mystery was laid ( by Being).
Look particles is possible from Large Hadron Collider (LHC) returned to work on the first Sunday in April (05/04), and now with an energy greater than earlier before 7 eV and 13 eV now, the particles will travel to 99 , 999999% the speed of light, and we can produce in the laboratory, similar to a micro black hole, this mystery in the universe.
After Hubble, a new laboratory will be present in the cosmos expanding our vision, named after the astronomer James Webb, he called James Webb Space Telescope, or just JWST, and unlike the previous one which saw images obtained by the visible solar spectrum, the JWST use infrared, and so you can see beyond the normal vision, and obersar the formation of the first galaxies and stars by studying their evolution to form galaxies, how is the production of elements and particles by the stars and see how to give their processes of its formation.
Look deeply in and out deeply, can help the man who broke up in modernity and to rediscover your being, or subject or object, but Being.
Hubble, infinite and postmodernity
24
Apr
Twenty-five years ago, exactly on April 24, 1990, the space shuttle Discovery took off to put in
orbit an observatory with a telescope Hubble, placed in orbit around the planet, that would change our view of the universe, our physical vision and perhaps the life.
It was observed points that were previously inaccessible to the human eye and were mysteries for researchers. As the Cat’s Eye Nebula (photo) detected in 2004, a nebula that is 3,000 years light of Earth, a nebula is a sun passing to eject their gases before settling as a solar star. As well as the nebulous Carina, 7500 light years from Earth, formed by gas and dust that allows astronomers to study details of star formation, the photo was captured in 2007.
The Copernican revolution that swept the geocentric vision, idea that the earth was the center of the universe, helped to release the ideal teocêntricos man confused and bring out the science and modernity, which now also are in crisis, but the fact that we see further may cause our myopia is exceeded and we start to look the Other not as an extension of self and the Same, but with equal rights that I.
Since the Third Meditation Cartesian, the philosopher Emmanuel Levinas established in their entirety and Infinite work, there is a break from the category of totality, which is based on the relationship between the cogito and the infinite idea developed in Descartes, and where Levinas extract your project to rethink the relationship between the Same and the Other ethics as first philosophy plan:
“And I do not believe that do not understand the infinite by a true idea, but only by a denial of the infinite .. unlike understand quite obvious that there is more reality in infinite substance than in finite and, therefore, that the perception of infinity is, in a way, me earlier perception of the finite, that is, the perception of God is prior to the perception of myself, for which reason it would give me that doubt, desire, that is, I am needy of something and I’m not totally perfect, if there was in me any idea of a more perfect being by comparison with which I know my faults?” (Descartes, 2004, p. 91-92).
Levinas reflects first about his “doubts everything” that conflicts with the external perception of the infinite idea, since it is no longer the cogito (systematic doubt) you think the infinite, but comes from the “I think” and should be the very idea of infinite substance (now seen by Hubble), the second is inadequate, because the infinite is not an overflow of ideatum, but the external relation that admits the experience with the new, the thoughtless and therefore outside the entirety.
In this infinite “thoughtless” that Levinas says Even the relationship with the other, “without the transcendence of cutting the ties that implies a relationship …” (Levinas, p. 35), and this way Levinas shows how modernity fixed this relationship on the basis of “I think” itself of modern rationalism, and this is the distance between the idea of the Other with ideatum standing in “transcendent being, the infinite is the absolutely other” (Levinas, Totalidade e Infinito, p . 35-36).
It is in this way that separates the infinite idea of Descartes that is the philosophical search for God’s existence, as in Levinas is linked to the search for a relationship between the Same and the Other, to keep the externality of the Other, and not attached to idea Same.
Descartes, R. Meditations on First Philosophy. Sao Paulo-Campinas: Editora da UNICAMP, Campinas, 2004.
Levinas, E. Totalidade e Infinito. Lisbon-Portugal, Edições 70, 1988.
The Paschal Mystery and the existence of God
01
Apr
Just as the Higgs particle explains by Standard Theory Physics, but valid only 4% of all universe called baryon
(energy and mass of particles and sub-particles) and now try to unravel the mystery of the other 96% of mass and dark energy through a new experiment that can understand black holes and the parallel universe (our previous post), also two metaphysical questions remains: whence came the universe? God exists?
The research Hadron Collider’s on the particles and the parallel universe tries to answer the first of only physical way, but could the universe was created in which principle.
But that answer the universe can give us about God, if your start is explained and revealed.
There are two attempts at answers, call the science of assumptions, one of them explains that there would be a fine-tuning a chance as unlikely mathematical combinations that only the existence of a higher intelligence explain these combinations, Francis S. Collins who was director of the Project Human Genome and is director of the National Institute of Health (NIH), American organ Health research formulated this hypothesis.
For Collins, “The bottom line is no accident. It reflects the action of something that created the universe”, and tunnelling is a important physical research in quantic energies.
As for the physical atheist Victor Stenger, professor of Hawaii and author of “God: The Failed Hypothesis” (Deus: a hipótese falha, no translation in Brazil) rule out the possibility of fine tuning.
For him the universe was not tuned to us, we were we to meet his conditions, and cites old assumptions that have been refuted: “Until the 20th century, it was believed that the matter could not be created nor destroyed, only transformed from a type to another, “so it is impossible to create matter, the very existence would be a miracle, Einstein proved that can be created from energy, and physical proved it can be transported something like the teleportation of science fiction, and also the NASA looking for life on other planets.
In fact prove that it exists or does not exist remains mystery as the mystery of life and even more the mystery of death, and it is precisely this passage death-life that is Easter.
Easter, which is Christian continuity of Jewish festival that celebrates the passage of life in Egypt of slaves to the Promised Land, is for Christians the passage from death to life.
After the Higgs particle, the parallel universe
30
Mar
The Large Hadron Collider (LHC), gigantic equipment that accelerates particles in a tunnel 27 km in diameter between the
borders of France and Switzerland, made the unprecedented experience that detected the Higgs particle, needed to consolidate the theory of physics Standard, which unified theories: quantum, electronics, photonics, electromagnetic and gravitational, into a single theory.
Now they want to do an experiment to prove the existence of parallel universes, and we would live immersed in 11 dimensions (see figure) and not the four we know (height, width, depth and time), they are in the “string theory “.
String theory was invented precisely the model to explain the movement of Hadrons, that would be basic of all blocks there, initially the model was the Polish Theodor Kaluza in 1919, left the Einstein equations and neglecting the masses and expanding the problem to five dimensions (four spatial and temporal), showed the unification of gravitational and electromagnetic fields.
But it was missing calls particles of gravity, strong and weak dimension, in 1980, Michael Green and John Schwarz called string theory and quantum mechanics, creating superstring theory, which seeks to cover all existing forces of matter, including the power weak gravitational one that explains the radioactive decay (called radiation) and the strong gravitational, explaining phenomena within walking distance of the atomic nucleus (nuclear fusion, for example).
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For this purpose the Hadron Collider is expected to double its amount of energy, making it possible to be generated micro-black holes, something impossible in previous past.
This study aims to view the theory of gravity rainbow, which would make it possible to double the dimensions in space-time, and gravity “filtered” to other higher dimensions, would separate the colors of different frequencies, reaching form a black hole.
In the spring in the northern hemisphere (in Brazil is winter – south hemisphere), the LHC is being prepared to try to create black micro-holes to observe these phenomena.
The arrow of time and the universe
26
Jan
The arrow of time, a term which states that always move forward (in the sense of the time) and that the universe had a beginning the Big Bang, and are expanding, was coined by the astrophysicist Arthur Eddington in 1927, and then used by Stephen Hawking to formulate the theory of the Big Bang, but she has other possibilities.
Another possibility is the work conducted by Julian Barbour, University of Oxford, Tim Koslowski, University of New Bruswick and Flavio Mercati, the Institute of Theoretical Physics, suggesting that perhaps suggest that gravity is not the thermodynamics, Hawking assumption and many physical, which is the arrow of time forward, this suggests parallel universes, and not a single expanding.
The theory is unifying because the two time paths, gravity pulls the particles to a larger and more orderly model, equivalent to galaxy clusters structures, stars and planetary systems, therefore exceeds the thermodynamic model, which drives only by the amount of energy.
Scientists have made a simulation using thousand particles, similar to a point, and subject to Newtonian gravity in this model there are two future possibilities, but the viewer has the opportunity to “try” just one of them.
This model is still initial and hypothetical, or does not incorporate quantum mechanics and general relativity not, but have open revolutionary and new possibilities.
If the theory is true the Big Bang is not the cosmic beginning, but only a stage in a timeless universe and eternal, explains the scientist Barbour: “This two future situation would display a unique past, chaotic in both directions, which essentially means that there would be two universes, one on each side of this central state, “and so we would always have two possible futures, it philosophically and theologically is true, but the physical needs of experimental certainties and not just hypothetical.
It seems that the whole universe has to make choices and we together with him.
Probe lands on Comet
12
Nov
Asked 10 years ago to enter the solar system in orbit, the probe Rosetta has released the module called Philae, which successfully landed on the comet 67/P Churyumov-Gerasimenko, where it will be in the coming months sending data on the celestial body, announced yesterday the European Space Agency (ESA).
The agency has its headquarters in Darmstadt, Germany, announced yesterday the 16h02 (9:02 a.m. EST, Brazil): “We’re in the comet” which caused great excitement in the control center.
The fact is unprecedented in human history, and comets can bring data on the origin of solar systems, about the origin of the universe and even about the origin of life.
After analyzing the telemetry (data travels through the solar system and take almost 30 minutes to reach the earth), it was noticed that the harpoons that hold the probe in the comet did not fire at first, and this attachment can detach the probe before to perform all the desired measures and tests, but maybe the problem is reversed.
Comets travel at very high speeds in the solar system, the P / indicates a comet is periodic with orbital period shorter than 200 years, which makes the calculations a little simpler for landing, but even so it’s like a fly lands on a cannon ball.
