Articoli rivista
Anno LIV – n.3 – luglio/settembre 2021 Una ricombinazione problematica
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, […]
Anno XXV - n.3 - luglio/settembre 1992 Una soluzione geometrica di un problema di ottica
A formula for calculating the index of refraction of a transparent plane parallel sheet is derived geometrically, the known quantities being the thickness of the sheet, the angle of the incident ray of light and the lateral displacement of the outgoing ray. […]
Anno XL - n.3 - luglio/settembre 2007 Una spazzola che cammina
We introduce a simple homemade toy, which can glide forward with no propellers, limbs, wheels, and seemingly no movement of any kind that can push forward against the ground. The toy arouses the pupils’ interest and their incentive to ask ‘Why’? […]