The effect has been established consisting in the change of the properties of silicon samples under irradiation by the light of another silicon sample located as far as several centimeters from the first one. The effect is observed when both samples are in contact with the “fluoroplastic – water solution of NaCl” or “Na-containing glass – water” systems. The results are interpreted basing on the previously suggested model assuming the excitation hypersound waves in the “silicon – native oxide” system and on the hypothesis about the propagation of the waves along the “water environment – solid” interface stimulated by the existence of Na+-(H2O)n clusters.