The nature of electromagnetic (EM) phenomena, including light, is not fully clear. Postulated rejection of EM
ether as a hypothetical habitat and distribution of EM waves, holds in the uncertainty and the problem of
understanding the existence of most of these waves, because the notion of "wave" inseparable from the concept of
"environment". EM ether, as a hypothetical environment of origin and propagation of EM waves, was declined by
postulate. This keeps the uncertainty in the problem of understanding the existence of these waves actually, since the
definition of "wave" is an part of the definition of "environment". The input in physics of the concept of wave
"coherence", which was necessary to explain the phenomenon of interference of light, also requires a transparent
physical interpretation.
Today use of the idea of the several-meters - length wave zugs, which are emitted by individual atoms, is at
least unconvincing, thus there is technical ability to generate powerful light pulses of 10-15 s.
A quantum model of the structure of the optical packet stream, which provides a transparent physical
interpretation of all parameters of coherent light, is offered. In this model parameters of coherence are organically
linked with the geometry parameters of the quantum packets. Developments of classical wave optics will not be
discarded.
To coordinate with the quantum-packet model and modern views about the nature of light, we either give them a
new interpretation or adjust, or develop these developments. In particular, a new interpretation of the experimental
fact increase the radius of coherence of light coming from distant sources (stars) is offered.
Modern conception of light corpuscles-photons is formulated. The estimations of the size of the spatial
localization of the photon is received. "Diffraction of photons" is considered.
It is considered questions of coherence of a light. The model of quantum packet structure of optical flow for connection
of its coherency with parameters of quantum packets is proposed.
In the article as an example of development three-coordinate precision accelerometer for super-small linear accelerations measurement an opportunity of increasing of measurements' precision has been illustrated by usage of pulsing fiber optical sensors (FOS). FOS used in accelerometer with time- pulsing modulation of output signal provides a unique technical parameters of an accelerometer. It allows us to recommend it to be used in space engineering (for space flying apparatus (SFA) accelerations measurement affected by brake action of the rests of planets' atmospheres (for orbital SFA), 'solar wind' pressure (for interplanetary SFA), geodesy, geology (for gravitational fields intensity measurements or their small deviations).
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