Q. Which of the following is Heisenberg uncertainty principle?
A) $\mathrm{\Delta}x.\mathrm{\Delta}p \geq \frac{h}{4\pi}$
B) $\mathrm{\Delta}x.\mathrm{\Delta}p = \frac{h}{4\pi}$
C) $\mathrm{\Delta}x.\mathrm{\Delta}p \leq \frac{h}{4\pi}$
D) $\mathrm{\Delta}x.\mathrm{\Delta}p < \frac{h}{4\pi}$
Explanation
(a)
It is impossible to determine simultaneously the exact position and momentum of moving particle like electron, proton, neutron.
$\mathrm{\Delta}x \times \mathrm{\Delta}p \geq \frac{h}{4\pi}$
where, $\mathrm{\Delta}x$=uncertainty in position.
$\mathrm{\Delta}p$=uncertainty in momentum.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.