quantum theory what is this
Quantum theory (otherwise known as quantum physics or quantum mechanics) is one of the two main planks of modern physics, along with general relativity, and between them the two theories claim to explain virtually everything about the universe.uantum theory (otherwise known as quantum physics or quantum mechanics) is one of the two main planks of modern physics, along with general relativity, and between them the two theories claim to explain virtually everything about the universe.