Classical physics deals with the behavior of macroscopic objects, while quantum physics deals with the behavior of subatomic particles. Classical physics follows deterministic laws, while quantum physics is based on probabilities.
Quantum entanglement is a phenomenon where two or more particles become connected in such a way that the state of one particle affects the state of the other, even when they are separated by large distances. This is known as non-locality and is a fundamental concept in quantum physics.
The uncertainty principle states that it is impossible to know both the exact position and momentum of a particle at the same time. This is due to the wave-particle duality of quantum particles, where they exhibit both particle-like and wave-like behavior.
Quantum tunneling is a phenomenon where a particle can pass through a potential barrier, even though it does not have enough energy to do so according to classical physics. This is possible due to the probabilistic nature of quantum particles and their ability to exist in multiple states simultaneously.
There are theories in quantum physics, such as the Many-Worlds Interpretation, that suggest the existence of parallel universes. However, this is still a highly debated topic and currently there is no definitive evidence to support it.