Scientists find a practical test for string theory January 6,Towson University This is an image of a two-dimensional hypersurface of the quintic Calabi-Yau three-fold. Yet inspired by Galileo Galilei and Isaac Newton, Towson University scientists say that precise measurements of the positions of solar-system bodies could reveal very slight discrepancies in what is predicted by the theory of general relativity and the equivalence principle, or establish new upper limits for measuring the effects of string theory. The Towson-based team presents its finding today, January 6,between 10 a.
History of the concept[ edit ] In his book, OpticksIsaac Newton suggested the idea of a multiverse: At least, I see nothing of Contradiction in all this. He said that when his equations seemed to describe several different histories, these were "not alternatives, but all really happen simultaneously".
Multiple universes have been hypothesized in cosmologyphysicsastronomyreligionphilosophytranspersonal psychologyand literatureparticularly in science fiction and fantasy. In these contexts, parallel universes are also called "alternate universes", "quantum universes", "interpenetrating dimensions", "parallel dimensions", "parallel worlds", "parallel realities", "quantum realities", "alternate realities", " alternate timelines ", "alternate dimensions", and "dimensional planes".
The physics community continues to debate the multiverse hypotheses. Prominent physicists are divided in opinion about whether any other universes exist. Some physicists say the multiverse is not a legitimate topic of scientific inquiry.
The ability to disprove a theory by means of scientific experiment has always been part of the accepted scientific method. Feeney analyzed Wilkinson Microwave Anisotropy Probe WMAP data and claimed to find evidence suggesting that our universe collided with other parallel universes in the distant past.
To be sure, all cosmologists accept that there are some regions of the universe that lie beyond the reach of our telescopes, but somewhere on the slippery slope between that and the idea that there are an infinite number of universes, credibility reaches a limit.
As one slips down that slope, more and more must be accepted on faith, and less and less is open to scientific verification. Extreme multiverse explanations are therefore reminiscent of theological discussions.
Indeed, invoking an infinity of unseen universes to explain the unusual features of the one we do see is just as ad hoc as invoking an unseen Creator. The multiverse theory may be dressed up in scientific language, but in essence it requires the same leap of faith.
He accepts that the multiverse is thought to exist far beyond the cosmological horizon. Ellis also explained that some theorists do not believe the lack of empirical testability falsifiability is a major concern, but he is opposed to that line of thinking: Many physicists who talk about the multiverse, especially advocates of the string landscapedo not care much about parallel universes per se.
For them, objections to the multiverse as a concept are unimportant. Their theories live or die based on internal consistency and, one hopes, eventual laboratory testing.
Ellis says that scientists have proposed the idea of the multiverse as a way of explaining the nature of existence.
He points out that it ultimately leaves those questions unresolved because it is a metaphysical issue that cannot be resolved by empirical science.
He argues that observational testing is at the core of science and should not be abandoned: In looking at this concept, we need an open mind, though not too open.
It is a delicate path to tread. Parallel universes may or may not exist; the case is unproved. We are going to have to live with that uncertainty.Physics: Electromagnetic Waves Field Theory Michael Faraday, James Clerk Maxwell.
The greatest change in the axiomatic basis of physics - in other words, of our conception of the structure of reality - since Newton laid the foundation of theoretical physics was brought about by Faraday's and Maxwell's work on electromagnetic field phenomena.
Max Planck makes his quantum hypothesis-- that energy is carried by indistinguishable units called quanta, rather than flowing in a pure urbanagricultureinitiative.com hypothesis leads to a successful derivation of the black body radiation law, now called Planck's Law, although in the quantum hypothesis as yet had no experimental .
Nov 25, · It's one of the most brilliant, controversial and unproven ideas in all of physics: string theory. At the heart of string theory is the thread of an idea that's run through physics for centuries. Time. Time is what we use a clock to measure.
Information about time tells us the durations of events, and when they occur, and which events happen before which others, so time has a very significant role in the universe's organization. Quantum theory is the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the atomic and subatomic level.
The nature and behavior of matter and energy at that level is sometimes referred to as quantum physics and quantum mechanics. Planck wrote a. Physicist Brian Greene explains superstring theory, the idea that minscule strands of energy vibrating in 11 dimensions create every particle and force in the universe.