Keyword: «duration»

In this article we will deal with two main types of time (objective and subjective), their differences, human mental processes. We observe the body's biological clock dependence on the objective time and identify four types of time orientation, as well as two types of time perception (linear and instantaneous). We will pay attention to the peculiarities of the time perception moving in a straight line (uniqueness, irreversibility and circulation from the past through the present to the future), in a circle (return to the past, stability, stability, increasing duration) or in a spiral.

The article identifies the problem of determining time in various sciences, presents a physical interpretation of time and proves that the method and means of measuring time are due to a real physical periodic process. The means of measuring time are considered in historical retrospect. Data on the measurement of time using a homemade equatorial-type sundial and the assessment of their errors are presented.