The basic principle of quantum mechanics is that there is an [[uncertainty]] in the location of a subatomic particle until it is observed. This explains why the [[Second Law of Thermodynamics]] is always true, and why everyone declines with old age: disorder tends to overcome order. Quantum mechanics explains the discrete nature of small-scale interactions, [[wave-particle duality]], the [[uncertainty principle]], [[quantum entanglement]], [[radioactive decay]], and [[chemical reaction]]s, and is used by all [[computer]]s and electronic devices today. No other theory explains all this. The act of observing converts the [[infinity|infinite]] uncertainty about where a particle is to a finite uncertainty, and that mere observation causes a change in behavior by the particle. | The basic principle of quantum mechanics is that there is an [[uncertainty]] in the location of a subatomic particle until it is observed. This explains why the [[Second Law of Thermodynamics]] is always true, and why everyone declines with old age: disorder tends to overcome order. Quantum mechanics explains the discrete nature of small-scale interactions, [[wave-particle duality]], the [[uncertainty principle]], [[quantum entanglement]], [[radioactive decay]], and [[chemical reaction]]s, and is used by all [[computer]]s and electronic devices today. No other theory explains all this. The act of observing converts the [[infinity|infinite]] uncertainty about where a particle is to a finite uncertainty, and that mere observation causes a change in behavior by the particle. |