Ce Este Timpul? |
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Ce Este Timpul? |
1 Apr 2004, 11:44 AM
Mesaj
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Vataf Grup: Membri Mesaje: 133 Inscris: 24 March 04 Forumist Nr.: 2.721 |
Bine v-am gasit!
Vreau si eu sa vad cam ce crede fiecare despre timp? Ireversibil... am auzit multe definitii, dar m-a surprins una dintre ele... cum ca timpul ar fi ceva bine determinat, voi ce credeti? -------------------- |
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8 Jan 2006, 05:07 PM
Mesaj
#2
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Vataf Grup: Membri Mesaje: 124 Inscris: 26 November 05 Din: Ploiesti Forumist Nr.: 7.335 |
Am gasit pe wikipedia ceva interesant referitor la asta.Conform mecanicii statistice se pare ca timpul termodinamic nu este ireversibil. http://en.wikipedia.org/wiki/Philosophy_of_space_and_time The second major family of solution to this problem, and by far the one that has generated the most literature, finds the existence of the direction of time as relating to the nature of thermodynamics. The answer from classical thermodynamics states that while our basic physical theory is, in fact, time-reversal symmetric, thermodynamics is not. In particular, the second law of thermodynamics states that the net entropy of a closed system never decreases, and this explains why we often see glass breaking, but not coming back together. While this would seem a satisfactory answer, unfortunately it was not meant to last. With the invention of statistical mechanics things get more complicated. On one hand, statistical mechanics is far superior to classical thermodynamics, in that it can be shown that thermodynamic behavior, glass breaking, can be explained by the fundamental laws of physics, paired with a statistical postulate. On the other hand, however, statistical mechanics, unlike classical thermodynamics, is time-reversal symmetric. The second law of thermodynamics, as it arises in statistical mechanics merely states that it is overwhelmingly likely that net entropy will increase, it is not an absolute law. -------------------- |
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