Didactic complexity of the physical experiments studied at school

The problem of the didactic complexity assessment of the physical experiments descriptions is considered. With help of pair comparisons method the assessment of the following characteristics of physical experiments is made: 1) the complexity of experimental installation; 2) the complexity of performance of experiment; 3) the complexity of a theoretical explanation. In addition, the years when scientists first carried out these experiments was identified. The experiment’s distribution in the space of four listed above characteristics are analyzed, the correlation coefficients between them and the absolute difficulties of theoretical explanation of experiments on scale of the relations are defined. It is shown that at discussion of the physics didactics problems the physical experiments studied at school should be characterized by two poorly connected characteristics: 1) the possibility of performance of experiment by the pupil; 2) the complexity of theoretical studying.