ABSTRACT
Any measurement of physical system is made by means of some device (in the more general case – the measuring environment). Thus there is an interaction of the device to measured system therefore the system condition to some extent changes depending on intensity of influence from the device. At measurements of classical system quite pertinently to suppose, that the measurement doesn’t change a condition of measured system at all. If describe a condition of measured system and measurement procedure make so in details that features of influence of measuring system that a situation cardinally are shown changes. It appears that owing to the quantum nature of physical systems during the measurement the conditions of measured system are changing. These changes are so more than more information received by measurement. It is necessary to pay for the information. So in the theory of measurements the information increase corresponds to reduction of entropy [1]:
Thus, increasing accuracy of measurement, we necessarily increase also return infl uence of measuring procedure by a condition of measured system.
