reply to post by digital01anarchy
Okay here it is.
One of the main reasons why quantum theory doesn't apply to large bodies is because of gravity. As you know, Newton came up with the maths for the
movement of large bodies. Newton predicted everything from matter elasticity to celestial bodies (like planets) orbits. But when we discovered the
atoms, and found out that there were electrons orbiting in there, Newton's equations didn't work anymore - obviously something else than gravity was
holding the atom together. So Bohr came up with a quantum model of the atom, which was specially designed for atoms. Not large bodies, because they
are different forces:
Quarks, in protons and neutrons, are held together by the colour force.
The hadrons in a nucleus of an atom is made of quarks.
Electrons stay in orbit around the atom's nucleus because of Weak interaction. You can't use Colour force to do that - Colour force is so small in
size that it does not interact with electrons, no more than your voice is strong enough to be heard all the way up to the Moon.
Objects are made of atoms.
Objects attract and repel each other because of Gravity. You can't use Weak interaction to do that - Weak interaction force is so small that it does
not interact, not even interfere, with large body movements.
That's why laws for atoms, at the quantum level, don't work for large bodies - we are referring to different forces, with different equations
specially designed for these events.
Where quantum forces stops matching the behaviour of large bodies, Newtonian classical physics takes over.
Another reason why quantum don't apply for large bodies: we can watch large bodies. BUT we can't watch particles. Here's why. When you look at a
large body, may it be a planet, a cell, anything, you can send light to it - and when this light is reflected by the body, you get an image of the
body. Remember that to see a body, you have to light it up in the first place. That works even at the microscopic level. You can even send an electron
beam, just like electron microscopes do, to watch molecules. BUT, as Werner Heisenberg showed, that doesn't work anymore when you try to observe
small particles. The reason is because light itself carries energy. If the particle is too small, and you shine a light on it, this light will collide
with the particle and kick it in some unpredictable direction. That's why Heisenberg introduced his Uncertainty Principle: past a certain point, your
microscopes (and any other equipments that sends a beam of light or a beam of electrons) will become useless - thus you'll never be able to really
know where the particle is. That's why quantum theory was introduced: to predict where this particle COULD be. To do that they use an equation which
they call a probability wave function. This equation basically guesses where the particle is more likely to be.
Where Newtonian classical physics stops working for small particles, quantum takes over.
The Universe is a super large body. Thus most concepts of quantum, which were designed to predict nothing larger than an atom, stops working once you
talk about galaxy clusters and all that.
There are many attempts to merge Newtonian, large-scale classical physics with Quantum, particle-scale physics. New Agers, which believe that you can
make large-scale bodies appear and disappear simply by looking at them (not even shine a light on them, just looking! Obviously they don't understand
that to be influenced, the particle needs to RECEIVE something from the observer, like light ) are very eager to find such merge in science. Some of
New Agers simply dismiss Newton's equation and firmly believe that Quantum can explain it all. They find comfort in believing that they can influence
matter around them simply by staring at it. Some New Agers merged that with meditation techniques and gave rise to the Quantum Buddhism movement, in
which if you just meditate enough you'll gain quantum superpowers like dimensional teleportation and other things like that.