Ma`rifat

The "quantum" theory with Copenhagen's interpretation is a new twentieth century theory which studies subatomic objects. This interpretation of quantum mechanics has certain epistemological bases. Instrumentalism, in the three ontological, semantic and epistemological areas, is one of the main foundations of this interpretation. In the critique of this epistemological basis of the quantum theory, one can argue that the internal perspective from the position of an empirical scientist leads us to realism. But the external perspective of history and the course of the development of science shows that instrumentalism is a correct theory. It is worth noting that, using a descriptive- analytical method, this paper has challenged the instrumentalist perspective of the proponents of Copenhagen's interpretation and physicists such as Schrödinger and Einstein, and one can even witness realism in some of Heisenberg's interpretations.