beardie napísal:preco si myslis, ze vesmir ma len 4 dimenzie?

A Brief History of Time napísal:Why don’t we notice all these extra dimensions, if they are really there? Why do we see only three space
dimensions and one time dimension? The suggestion is that the other dimensions are curved up into a space of
very small size, something like a million million million million millionth of an inch. This is so small that we just
don’t notice it: we see only one time dimension and three space dimensions, in which space-time is fairly flat. It
is like the surface of a straw. If you look at it closely, you see it is two-dimensional (the position of a point on the
straw is described by two numbers, the length along the straw and the distance round the circular direction).
But if you look at it from a distance, you don’t see the thickness of the straw and it looks one-dimensional (the
position of a point is specified only by the length along the straw). So it is with space-time: on a very small scale
it is ten-dimensional and highly curved, but on bigger scales you don’t see the curvature or the extra
dimensions. If this picture is correct, it spells bad news for would-be space travelers: the extra dimensions
would be far too small to allow a spaceship through. However, it raises another major problem. Why should
some, but not all, of the dimensions be curled up into a small ball? Presumably, in the very early universe all
the dimensions would have been very curved. Why did one time dimension and three space dimensions flatten out, while the other dimensions remain tightly curled up?
One possible answer is the anthropic principle.
....

RATZINGER666 napísal:mystique: to video som nevidel, ale ak pises, ze kvantova mechanika je nova vec, tak mozno tak akurat pre Teba... ziadne ucebnice sa menit nebudu, je to storocna teoria... neviem, ake ucebnice myslis, ale ak myslis tie, ktore z ktorych sa vyucuje fyzika na strednych skolach, tak to tazko, v tych su zhrnute zaklady postacujuce pre vyucovanie, na vysokych skolach zase mozno najst odbory priamo venujuce sa tejto fyzike dopodrobna... vseobecne mi pripadas podla prispevkov v tejto a v pribuznych temach ako clovek, ktory si nieco nove precital, nadchol sa pre to, no ale to je zhruba tak vsetko... ak som Ta neodhadol spravne, ospravedlnujem sa, ale uz som si to vsimol davnejsie a chcel som Ti to aj davnejsie napisat...