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If the uncertainty in the measurement of the position of a particle is 5.0 x...

Physics
JAMB 2003

If the uncertainty in the measurement of the position of a particle is 5.0 x 10-10m, the uncertainty in the momentum of the particle is

  • A. 1.32 x 10-44Ns
  • B. 3.30 x 10-44Ns
  • C. 1.32 x 10-24Ns
  • D. 3.30 x 10-24Ns
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Correct Answer: Option C
Explanation

From the uncertainty principle the product of the position and momentum of a sub-atomic particle is equal or greater than planck's constant.

i.e \( \Delta x. \Delta p \geq h.\)
\(\text{Thus} 5 \times 10^{-10} \times \Delta p = 6.6 \times 10^{-34}\)

\(\Delta p = \frac{6.6 \times 10^{-34}}{5 \times 10^{-10}} = 1.32 \times 10^{-24}Ns\)

\(\text{Therefore Uncertainty in the momentum } = 1.32 \times 10^{-24}Ns \)


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