Interaction of a wave with an accelerating object and the equivalence principle

The paper presents a new view of the so-called accelerating matter effect. It was stated earlier that the effect is optical by its nature and is essentially a change in the frequency of the wave transmitted through a refractive sample that is moving with acceleration. But as follows from a simple consideration based on the equivalence principle, the opinion that the effect is related only to the phenomenon of refraction is unjustifiably narrow, and the change in frequency must appear during scattering by any object moving with acceleration. Such an object can be an elementary scatterer or any device that transmits a narrow band signal.