Q: what and why
Quantum physics was born to describe the behavior of light, of atoms, and of their interaction. It grew to encompass almost all of physics: all that is “very small” (atoms, nuclei, sub-nuclear particles) and their assemblies (molecules and all of chemistry, solids with their properties: magnetism, conductivity…). Nowadays, most physicists think that “everything is quantum”, and if we don’t see those effects it’s just because we don’t have enough control.
So, don’t you think that something that describes “almost everything” is worth knowing?
But forget for a moment about the quantity of material, the predictive power, and look at some of these predictions themselves. They tell us fascinating facts about nature:
- Particles are not localized objects, they can be “delocalized” in space
- There exist intrinsic randomness (yes: real, irreducible random behavior)
- A pair of particles may have well-defined properties, while the properties of each particle are not determined at all (this is more complicated, but read it calmly, it’s really strange)
and many others. Don’t you think one should know about this?