Photoconductive CdS cells are cheap solid state devices, suitable for a first understanding of the optical properties of semiconductors. This work presents two experiments, concerned with static and dynamic behaviours of a CdS cell, which allows us to verify simplified model explaining semiconductors’ […]
Communication technologies allow teachers to keep in touch with their pupils in case of absence and after school hours. […]
Visiting the astronomical observatory is the occasion of a cultural growth. This visit, to be effective and incisive, must be prepared, before and during the course of it, by dealing with some basic contents. These should be selected according to a triple reference: the pupils’ […]