Originally posted by stellspalfie
can anybody explain in a quantum mechanicvs for dummies kinda way (me being the dummy) why the matter behaves like a particle and a wave and why their behavior changes when observed. i saw the experiment on a documentary a while back and ive been thinking there must be a lot more to it than was explained.
Nobody knows why
a quantum entity behaves like a quantum entity, any more than anyone knows why
a field behaves like a field.
The best way to think of it, I find, is not to insist that a quantum entity behaves either like a particle or a wave, but that macro particles and macro waves behave like quantum entities at the extreme ends of their behaviour. For example, an electron does not behave "as a particle" when it hits another electron and knocks it out off its orbit, nor does it behave "as a wave" when it passes a double slit. In both cases, it merely behaves as a quantum entity should, under those circumstances.
Rather, a macro particle behaves as it does because (due to its large size) it is always at the extreme "particle-like" end of the behaviour spectrum, and a macro wave always behaves as a wave because it is always at the extreme "wave-like" end. In theory, even large objects, like ping-pong balls or even humans, could
exhibit the other parts of the spectrum; it's just that, because of our size, it is more than astronomically unlikely that we ever will.