Highschool students studied oscillatory motion using sensors interfaced with graphic calculators. Three kinds of activities were performed: a first activity in the school gym, an extra-curricular laboratory course and a grade 11 lab class. The potentialities of physics investigation starting from the study of phenomena in an informal context are pointed out and the advantages and problems of the use of on line acquisition are discussed. […]
Dealing with a new physical subject one often goes on too hastily in the initial stage, leaving some uncertainties and ambiguities in definitions and in basic features. Furthermore one performs schematizations and simplifications which may be in contradiction with fundamental principles or experimental results. […]
In ancient times, the interest in colour and related techniques involved almost exclusively artists, decorators, fabric dyers, professionals who needed clear recipes to obtain the desired effects in their works, or philosophers and thinkers, because of the symbolic and religious meanings of colours. […]