J. Cserti: The optics of the rainbow – I P. Mészáros: High energy neutrinos. Cosmic ray physics and astrophysics T. Papp: The foundations of Lagrangian mechanics M. Kun: Interactions of young stars with their surrounding I. Héjjas: Phase contrast microscopy COMMEMORATIONS E. Klopfer: K. Simonyi’s school of accelerator builders TEACHING PHYSICS L. Pálfalvi: Planet Mars again near to the Earth SCIENCE IN BITS FOR THE SCHOOL How to screen a mobile phone (G. Tichy ) WORLD YEAR OF PHYSICS 2005 NEWS OPINIONS Comments on an interpretation of the theory of relativity (F. András) The Department of Chemical Physics at Budapest Technical University (Z. Noszticzius, H. Farkas) EVENTS