Why the corpuscles-quanta are not detected in long-wave radiation (concerning visible-light band), for example in microwave band? The field distribution for radiation of this band is accessible for direct research, for example, by applying a microwave measuring line. In this case, the measuring line probe detects only the nodes and the crests peculiar for the standing waves. Even if to suppose that large amount of the corpuscles are present in these standing waves, then it is necessary to explain, what compels the corpuscles to form the nodes and the crests? But if the corpuscles - quanta in microwave radiation is no, then Einstein's hypothesis is not valid, at least, for this radiation mode, i.e. it can not be extended to all electromagnetic band. So, here emerges the question, why the corpuscles-quanta are present in one radiation mode, but are absent in the other ones?

And else the questions..

How are the wave structure of radiation and the corpuscle - quantum correlated, where is the photon hidden in the wave structure of a light beam propagating in space?

Whether interact the photons with each other in light beam and if yes, then by dint of what agent?
Why the corpuscle-photon is moving and just at light velocity, why is this moving at greatest possible velocity in nature, according to theory of relativity?

The list of the questions can be prolonged, but it is senseless. Why?

/Citation/ But, thus by entering the concept about light particles, we can not bind up with this the concept about their motion, the concept about their continuous movement from one point of space to the another, inasmuch as propagating of light flux and also its behavior, from viewpoint of p o s s i b l e energy influences, is determined by the laws of t h e w a v e f i e l d - of the wave processes./end of the citation/ [28] §3 p.49, spacing of the source.

The meaning of this citation does not allow speaking about the photon as about an actual particle-corpuscle and consequently the mentioned questions have no significance for this. It is interesting to note, that the cited work was published in 1934, i.e. this belongs to period of making quantum theory. It means, that the photon was not considered as actual particle already at that time. Or may be, this was not yet considered?

/Citation/ It is known that the hypothesis of light quanta has met with very great difficulties and was being considered during long time as Einstein's peculiar error, which ones was being forgave to him only because of his great merits in other areas. /end of the citation/ (see [26] editor's foreword, the evolution of de Broglie's ideas.) Here is given also the fragment from Einstein's letter written in 1918. /citation/ .. I don't doubt more in the reality of the radiation quanta, though in this conviction stay only I alone./end of the citation/

But, how the photon should be understood? May be so?

Statement 41. The photon is not real-existing corpuscle, but is entered as convenient mechanistic model to describe interaction processes of light with matter.

Now, here is else citation reflecting Newton's viewpoint (XVII century) and his corpuscular view onto light.

/Citation/ He (Newton - my note) considers the corpuscle as if surrounded by aether waves excited by one's own oscillations, the red corpuscles - by long waves, the blue ones - by short waves. Thus, the light, in his opinion (Newton - my note), is not quite corpuscular and is not quite undulating, but is an inseparable mixture of both these properties. /end of the citation/ J.J.Thomson, lecture "the structure of light".

Thus, the Einstein's hypothesis returns into science the corpuscular theory of light, which one was supplanted by the wave theory in end of XVIII century, i.e. the idea about photon already was known in physics in Newton's times, but it is possible, that this idea is much older.

Why this idea during such long time, by emerging periodically, could not become hardened in physical theory in past?

To understand it, let's trace into which corollaries this concept can led into? We shall consider it in modern view, i.e. in view of Einstein's hypothesis.