Everything we see around us, any objects and phenomena, and of course people, are part of the classical world. This world is governed by the laws of classical physics.
But quantum mechanics allows us to see the peculiarities of a tiny world where atoms and subatomic particles play the main role. This world is called quantum and it is home to seemingly very strange things that sometimes contradict classical physics.
For example, in the classical world, water can only be in
one of three states at a time: liquid, solid, and gas. It cannot be in
two states at the same time. But in the quantum world, a particle can
exist in several states at the same time due to a phenomenon known as
superposition....<<<Read More>>>....