Since the introduction of the Bohr postulates, quantum theory has interpreted a large number of natural phenomena correctly and, most important, has described them perfectly in mathematical terms.

Today, this advanced domain of physical science has expanded so much that a single individual could hardly be successful in getting even an almost complete overview of all fields of knowledge covered by quantum theory. Often years of education are necessary before a physicist becomes an expert in one of the great many specialized fields.

Considering the speed of development of quantum theory, we have to acknowledge that the era of tremendous and rapid progress seems to be over since every new finding is likely to be gained with a great deal of experimental and computational effort, and that discussions about new hypotheses seem to absorb more and more time.

Similarly, one also gets the impression that in the light of various experimental results, quantum theory will be faced with problems that are difficult (or even impossible) to solve.

Maybe quantum theory really has reached a limit that no longer allows considerable progress in the recognition of nature?

If this is true, one can expect that the basic principles of this huge theoretical structure are not solid enough designed to support said structure and that one possibly has to start again from the very beginning.

This paper pursues such a goal. It intends to doubt the correctness of the foundations of quantum theory, since it is exactly these foundations that include apparent contradictions for the layperson almost without exception. These include the dualism of light (which could also be assigned a wave packet that should actually dissolve immediately). Also included is the electron spin that should be so immense that even the highest speed admitted by the relativity theory – the speed of light – is surpassed many times over. Moreover, quantum theory also comprises the famous uncertainty principle that forbids any penetration beyond a specific limit, etc.