By Helena Eilstein
This is a set of a few works of Polish philosophers and physicists on philosophical difficulties of time and spacetime. with out proscribing the thematic scope of the papers, the problem conceming objectivity of time move runs as a uniting thread via so much of them. in part it's mentioned directIy, and in part the authors specialise in issues that are of paramount value for one's perspective to that question. within the first six papers the authors care for their subject matters opposed to the heritage of up to date physics, its theories, its problems and mentioned conjectures. For the paper of S. Snihur that historical past is equipped by way of daily worId-outlook, and the writer discusses the matter of lifestyles and personality of the longer term within the gentle of uncomplicated rules of cIassical good judgment. The paper of A. P61tawski, in regards to the perspectives of the phenomenal polish thinker Roman Ingarden, enriches the thematic scope of the coIIection introducing into it a few questions from philosophical anthropology and ethics. JERZY GOLOSZ movement, house, TIME*. summary. The paper discusses the houses of spacetime we research by means of interpreting the phenomenon of movement. Of exact curiosity are the spacetime symmetries. the spacetime constructions and the ontological prestige of spacetime. those difficulties are thought of at the grounds of the c1assical theories of movement contained in Newtonian physics, certain and common thought of relativity. the talk among an absolute and a relational notion of movement and its ontological implications also are analyzed.
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Additional resources for A Collection of Polish Works on Philosophical Problems of Time and Spacetime
The two most promising approaches, which are based on string theory and on the so--called loop quantum gravity (developing ideas introduced in 1987 by Abhay Ashtekar) still remain in their initial stages and are coping with a multitude of difficulties. They are very far from making any physical predictions that might in principle be experimentally tested. Using anthropomorphic terms one would say that gravity (particularly Einstein's GR) effectively protects itself from being quantized. The best example of the difficulties is the problem of time (and closely related to it the problem of space).
Defined in this way time has a fundamental feature: it has a direct geometrical meaning - the physical time which elapsed between two given events on the timelike worldline of the measuring clock is equal to the length of this worldline (between these points) divided by the light velocity c. This fundamental property of physical time was discovered by Einstein while he was formulating SR. The property is carried over to the curved spacetimes of GR. Thus the definition of physical time in both SR and GR is purely geometrical and is the same.
For the same reason there is only some probability for any value of the velocity of any signal. Clearly such a 'probabilistic time' is unsuitable for parametrizing any curve and thus an evolution of a physical object having this curve as its worldline cannot be described in terms of this time. For the needs of quantum theory the probabilistic time is completely useless. I wish to emphasise on ce more that the whole conceptual and mathematical structure of QFr is based on the assumption that all physical processes take place on a fixed rigid stage - the flat spacetime (Minkowski space) which is insensitive to what is occurring on it and thus is an absolute element of the theory.