The calculation procedure of optical characteristics of stellar atmospheres is described for the model of homogeneous partially ionized nonrelatlvistic isotropic plasma with the account of indlvidual particles collision. A advance is described for calculation of the refracted electromagnetic radiation magnitude of an eclipsed component in the atmosphere of an eclipsing one in the close binary system during total eclipse.The frequencies of the incident electromagnetic wave and the characteristics of the atmosphere layer are indicated in which the real refraction effect in the latter may generate some additional radiation throughout the total eclipse observed in twelve close binary system.