T-symmetry

T-symmetry is the symmetry of physical laws under a time-reversal transformation—

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:: T: t mapsto -t.

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The universe is not symmetric under time reversal, although in restricted contexts one may find this symmetry. Physicists distinguish time asymmetries that are intrinsic to the dynamic laws of nature, and those that are due to the initial conditions of our universe. The T-asymmetry of the weak nuclear force is of the first kind, while the T-asymmetry of the second law of thermodynamics is of the second kind.

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Symmetry: Symmetry is a characteristic of geometrical shapes, equations, and other objects; we say that such an object is symmetric with respect to a given operation if this operation, when applied to the object, does not appear to change it....

Transformation: Transformation may refer to:...

Weak nuclear force: The weak nuclear force or weak interaction is one of the four fundamental forces of nature. It is most commonly seen in beta decay and the associated radioactivity. The predicate weak derives from the fact that the field strength is some 1013 times less than that of the strong nuclear force. The ter...

T-symmetry related Images and Photos (experimental)

Winter Symmetry	Classical Symmetry IV	Symmetry in Black IV	Classical Symmetry III
Keane: Perfect Symmetry	Keane: Perfect Symmetry	Studies in Symmetry VI	Studies in Symmetry III