PREDNASAJUCI / LECTURER : Mgr. Marcela Bodnarova NAZOV / TITLE : Chromospheric Response of Dynamics of Photospheric G-band Bright Points ABSTRAKT / ABSTRACT : We studied response of the observed dynamics of the photospheric GBPs in the chromosphere in the selected areas of network and internetwork through designated spectral characteristics of the Hα spectral line. An analysis of evolution of these spectral characteristics in time, their autocorrelations and their cross-correlations showed that width of the Hα spectral line profile, residual intensity of this line core and velocities deduced from the Doppler shifts of the profile core and the profile core as whole respectively show oscillations with period of ~ 8 (~ 13, ~ 16) min. Oscillations in the line core residual intensity lagged behind oscillations in the other three studied parameters by ~ 1-2 min. In cases of the selected internetwork areas no statistically important periods were observed in neither of the four studied parameters. In one of the studied network areas we observed a sudden onset of the above mentioned oscillations in the middle of duration of our observations. An analysis of development of granulation and the GBPs in this selected area and their response in the chromosphere showed that this sudden rise of oscillations was caused by joining of two separated groups of the GBPs which occurred after disappearance of a granule under the photosphere. Response of this event in the chromosphere was found to be a repeated occurrence of elongated brightenings. The reported oscillations can be caused by propagating of the MHD waves through the solar atmosphere where these GBPs were observed.