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(D) The Heisenberg uncertainty principle states that it is impossible to determine simultaneously the exact position and exact momentum of a microscop

Vedclass · Accepted Answer

$B$ and $C$ both

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(D) The Heisenberg uncertainty principle states that it is impossible to determine simultaneously the exact position and exact momentum of a microscopic particle. Mathematically,$\Delta x \cdot \Delta p \ge \frac{h}{4\pi}$. This principle is significant only for microscopic particles like electrons,protons,etc. For macroscopic objects like a motor car,the uncertainty is negligible due to their large mass. For stationary particles,the velocity is zero,meaning the momentum is exactly known $(\Delta p = 0)$,which leads to an infinite uncertainty in position $(\Delta x = \infty)$,making the principle inapplicable in the standard sense. Therefore,the principle is not valid for macroscopic objects and stationary particles.

The Heisenberg uncertainty principle is not valid for

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