The book is a record of lectures by one of the largest physicists of our days P. Feynman . Lectures are devoted to the problems of electromagnetic interaction of strongly interacting elementary particles (adrons) and were read in 1971-1972. The use of photons as test objects provides unique information about the structure and properties of hadrons. The book combines the merits of a textbook and a monograph. Detailed understanding of the specific processes of interaction of photons with hadrons. Experimental results are discussed in connection with the possibilities of their theoretical interpretation in the spirit of the quark model, dispersion relations, current algebra, and t. p. The hypothesis of its presence is considered in detail - inside the nucleon of special point objects - partons Being the author of the parton concept, which has received wide recognition in recent years, P. Feynman discusses its various aspects. The presentation, as a rule, is carried out at a simple general physical level, accessible to both theorists and experimenters. The book is useful to physicists interested in the structure of elementary particles and their properties - scientists, teachers, graduate students and senior students .