Question

What is uncertain in the Uncertainty Principle?

Answer 1

Uncertainty Principle:

1. It is a principle in quantum mechanics:
2. It generally says that it is impossible to discern simultaneously and with high accuracy both the position and the momentum of a particle (such as an electron).
3. It is also called also Heisenberg uncertainty principle.
4. The effect of the Heisenberg uncertainty principle is significant only for the motion of microscopic particles, and for macroscopic objects, it is negligible.
5. We can say that when we calculate the uncertainty of an object which has a mass of a milligram or more, it has hardly any consequence.
6. Mathematically, It can be expressed as shown below:
7. $∆x.∆p\ge \frac{h}{4\mathrm{\pi }}$, Where $∆x=$uncertainty in position, $∆p=$uncertainty of momentum, $h=$Plank's constant,
8. The principle is applied to the position and the momentum of the particle.
9. According to the uncertainty principle, if the position is known, then the momentum is more uncertain and vice versa.
10. Mainly this principle deals with uncertainty in the position and momentum of a particle.
11. Also, several different names are used for such uncertainties: inaccuracy, spread, imprecision, indefiniteness, indeterminateness, indeterminacy, latitude, etc.
12. As we shall see, even Heisenberg and Bohr did not decide on a single terminology for quantum mechanical uncertainties.

Thus, In the uncertainty principle, mainly position and momentum are uncertain.