But today I want to speak of the invisibilidade and the trip in the time. The invisibilidade is a pparently badly understood well simple phenomenon and that depends, in some cases, so only of the size of the bodies and its speed. When the bodies are very small, to the times do not enxergamos them. when they are very great, or distant, also not, for being outside of the reach of our visual capacity. Who remembers Micrmegas de Voltaire? On the other hand, if to look at for a solid body, as a rock, it in them seems solid, but in the reality it is formed by a infinity of spaces and atomic particles in movement that we exactly do not enxergamos for its size and speed. The scholar Democritus, in the antiquity, said that the atom was the lesser particle of the substance, and during much time thus it was considered, until the subatmicas particles had been uncovered.
Some beings and substances also remain invisible depending on its constitution or molecular composition. But we go to a practical and common example. A off fan. Its helices are visible. But if binding, the helices start to turn and disappear. Thus it happens with the bodies that if dislocate in speed bigger of what that one that our brain and our eyes can perceive. Therefore, to be visible or invisible is a question of size, color, appearance, consistency, distance and movement. How much to the trip in the time, so explored in fiction books, through the thought we can tranquilamente carrying in them to where to want, for the future that we imagine or the past that already we know.