It’s no fantasy, dude, check it out:
theonion.com/content/node/29433
Very nice but it’s mainly speculation. Scientists like to use their fantasy too… and speculate.
What Heisenberg’s Uncertainty Principle says is that if something is small enough, you can’t say anything about it.
No this is false. Heisenber uncertaint principle means that in the quantum world (the world at nanometric scale and lower) you cannot know with arbitrary precision two “commutative properties” of a syste (like position and momentum for example).
This mean that the more precisely you know one property the less precisely you know the other.
The famous formula Dx
Dp>h/2, represents this where Dx and Dp are the uncertainties of the value of the properties and h is here the ‘Dirac constant’ (the Planck const. divided by 2pi)
This means that if Dx approaces zero Dp must become larger and lager and viceversa.
Quantum physics was developed in the 1930’s, as a result of a bet between Albert Einstein and Niels Bohr, to see who could come up with the most ridiculous theory and still have it published. Most people agree that Bohr won hands down, although Einstein did very well in the swimsuit competition.
LOL
Anyway the real history went like this.
QM started in 1900 when Planck tried to solve some problems in physics (such as the ‘UV-catastrophy’ of balck body radiation, look it up…) and theorized that energy was quantized and not continues (hence QUANTUM mechanics). Planck originally though of it as a mere mathematical device, not something physical
In 1905 however, Einstein confirmed that energy was quantized with the photo-electric effect, which got him the Nobel Prize (that’s right he got it for the Photo-electric effect, not relativity!)
The idea of QM rose in the 1910’s and made a big leap into mathematrical formality especially in the 1920’s especially by contributors such as Schrodinger (after whom the famous equation is named after), DeBroglie, etc…
Schrodinger, basing himself on the idea of particle-wave duality of DeBroglie, though of an Hamiltonian* that could describe a particle. The Hamiltonian, however was similar to the Hamiltonians used in classical physics to describe Waves, not particles.
Hence the name ‘wavefunction’.
(*The Hamiltonian, named after the XIX century scientist Hamilton, is a differential equation that is used to describe a mechanical system)
In the 30’s the theory continued to be investigated and tested and in the 40’s it was refined in what we know now as ‘quantum field theory’.
Basically QM started as a ‘mathematical artefact’ to describe some puzzles in physics and ended up opening a whole new world, ending the era of ‘classical physics’ (The theory of relativity, both the special and general one are still ‘classical’)
QM is not about reality, but probability guessing. It’s “objects” are not physical objects, but statistical objects (which is why an object can be in 2 places at the same time). Its “dimensions” are not physical dimensions, but mathematical arrays for possibilities. It isn’t about physics, but your mind (hence a religion).
That video explained it accurately.
No.
1- Usually QM is done in 4 dimensions (3 for space, 1 for time) or moresometimes in just 2 or 3 (1 -2 dimensions of space and 1 for time…), this is done with some approximation, where it applies at least to save computing power.
Here the dimentions are very real!
2- The 10 dimension story does not involve QM but STRING THEORY.
3- There is a HUGE problem in physics. While we can quantize three of the four forces of nature (Electromagnetic, weak and strong force) we cannot quantize gravity. A 5th dimentions in relativity came out in the 80’s in trying to solve this (the dimension is a “compact” one, real but invisibile to us)
4- While we have now a standar model that can reunite all in one three forces (well at least the weak force and the electromagnetic force… on the strong force there is still some work to be done) in no way gravity is compatible to the with the current QM theories
5- So different quantum-gravity theories arose, such as “loop quantum gravity” and “String Theory”. String Theory
needs10 dimensions or more to work. These are REAL dimensions (but perhaps different that the 3 spacial dimensions we are used to)
6- No model of quantum gravity is now satisfactory (hence cannot be properly called a “theory”) as a model (eg there are many ‘string theories’ but they cannot be all correct!) nor are we capable of testing such models.
7- Many quantum gravity models, like string theory, assume that General Relativity is correct (among other assumptions). Although GR seems to be correct according to the experiments, if someone would prove that GR is false (there are several other gravitation theories that work also quite well!) then string theory would be worthless.