Amazing experiments, performed with the first electrostatic machines, showed sparks and electric discharges emanating from charged bodies. The use of more efficient equipment also allowed researchers to investigate the properties of electric discharges, even thanks to specially designed devices, such as the paper and the glass perforators. […]
Among the first electrostatic machines, the one developed by Edward Nairne, a skilled English instrument maker of the second half of the eighteenth century, should be mentioned. This electrostatic generator is little known, however it was used in medical field for over a century. […]
In 1666 Newton used a glass prism to decompose white light and make the so-called “rainbow” colors appear. The next step was to get the white light back from that “rainbow”. To do this, different techniques can be adopted, we will examine one in particular, […]