| Re: pass through walls? yes this would be possible (in theory).
it has to do with quantum uncertainty. Since we never can know the position of a particle exactly, the position becomes smeared out over space, only to fix itself on a certain point if we measure the particle. With this property, particles can 'tunnel' through classicly impossable barriers (this effect has been measured in great detail).
So if this can happen, then why don't we fall through the chair we're sitting on? the answer is that the probability (quantum mechanics only tells us something about probabilities) tunneling to happen is extremely small. (all the approx. 10^36 atoms of your body have to travel through all the 10^36 atoms of the chair....). So in everyday live we don't see this effect. Increasing the speed (and thus energy) of a particle does increase the tunneling probability, but, since we have a speed limit, never to a point where tunneling anything but a single particle woulhave a likely probability
Bo |