The Invariances in Physics and their Function in the Physical Cognizance

Abstract

The paper presents the invariances of the most important physical transformation and their meaning for the cognizance in physics.

In the first part are discussed the invariances the physical laws with respect to a change of the system of units, physical theory (physical analogy), Galileo's and Loretz's transformations, the inavariances generated by the symmetry of space and time, canonical and unitary transformations.

The second part is focussed on the meaning of these invariances for the description in physics, as well as, for the forming of physical laws and theories.