If you're unsure about anything just fire me questions, I'm getting to the point where I can explain things more simply but sadly in less detail than the likes of Wiki.
When you first get into the stuff it's a nightmare you go onto most websites and it's just a bunch of jargon and it's hard to decipher what's really going on.
You can do a calculation yourself it's not too difficult, perhaps calculate your own personal wavelength.
For the record Planks Constant is a very small number 6.63x10^-34, which is why if you divide by even a momentum of 10 (momentum = mass x velocity) the wavelength is still tiny.
Whereas particles like electrons have a mass of 9.11x10^-31 (or something) so if you plug that in for a given velocity you actually get a reasonable wavelength. As even though "h" (the symbol for Planks constant) is so tiny you're momentum is also very small, so a reasonable wavelength is achieved. One that will go through clear interference and other wavelike properties.
Posted this in the other thread but it was horribly off topic, in response to you things about subatomic particles.
Everything has both a particle and a wavelike property, macroscopic objects just have such extremely small wavelengths that it no longer matters.
By virtue of Wavelength = Planks Constant/Momentum.
Hence if you know the momentum of a car, for example: 1000kg going at 10 meters per second, then the momentum is 10000 Newtons per second.
Take Planks constant over 10000 and you get the equivalent wavelength of said car which is a very small number.
The truth is there is no difference between "particle" and "wave" they are all the same thing.
And by the way IIRC it's the other way around, observing something collapses the wave function which is basically the probability of observing something in a given space. Nothing works on definites in the universe there is only a "probability" that you'll find an electron at a given location for example.