LAUSR

Abstract The paper proposes a model of optical transmittance of ultra diluted gas taking into account gas particles non-locality, the quantum effect of wave function spreading derived from solving the Schrodinger equation for a free particle. We indicate some quantitative and qualitative consequences of this model. E.g., the optical transmittance of such a gas increases significantly, up to 100%, as compared to the classical predictions. We show the relationship with the classical models by deriving the Beer–Lambert law equation within range of its applicability. The proposed model is applicable to dark and thin interstellar and intergalactic regions, that is, to most of the Universe. In this regard, we indicate a connection with some astrophysical phenomena, including dark matter. We show the impact on interpretations of quantum mechanics. We propose possible experiments and refer to the results of one of them consistent with the predictions of this model.