Abstract
The alleged observation of traces of inflation of the Universe in CMB spectra was later ascribed to the scattering from the space dust (BICEP2, 2018). Hence, the development of experimental methods, which distinguish between light from objects with a similar color temperature and polarization presents an important practical problem. In this paper, we discuss the proposal to discriminate between objects with the same color temperature but having different angular spectrums by intensity interferometry. The two-point correlation function of the black body image with extended angular spectrum has significant differences with a correlation function of a black body with a narrow angular spectrum.
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