Search

This paper reports on the first known larva of Atrichops crassipes (Meigen, 1820) from Hungary. The single specimen was caught with flushing of stones during a year-long monthly sampling in the Morgó Stream, Börzsöny Mts. Characterisation of the sampling site, list of the accompanying fauna and a figure on the habitus of the specimen are given.

The investigation of the light-induced changes of refractive index in a LiNbO(3): Fe sample in case of strip-like illumination is presented in the contribution. The changes of the refractive index are visualized by interferograms of the sample obtained for various orientation of the illuminated strip and various polarization of the light used during interferogram creation. The investigation shows that character of the dependences of the refractive index on the coordinate perpendicular to the illuminated strip is different for different strip orientation. It indicates the possibility that for different orientation of gradient of the illumination the different mechanisms are responsible for changes of the refractive index.