Physics
The green ray
Weightnessless in the elevator
The periodic table
Physics of the spaghetti
Albert Einstein
First stage to the invisibility

During the summer 2006, John Pendry and David Smith gave a theoric solution to make some objects invisible, by diverting the rays and giving the feeling that they pass through it. And only a few months later, they did it !
They made a little cylinder (12 cm of diameter) composed of many cylindrical layers made with little metallic buckles (that's why the rays are diverted). Then they put in this object a cylinder of copper and lighted it with micro-waves. Result : on the other side, this waves seemed not to have met any object !
However, this method now succeeds only with waves in little frequences, like the micro-waves, but not with the visible light because the diameter of the little metallic buckles has to be reduced. And for a procedure of concealment, it's for the moment only a dream : the waves doesn't go through the object, they go around it. So, a man in the cylinder wouldn't receive any light and wouldn't see anything from the other side !

According to Sciences et Avenir number 718, décembre 2006