Uncertainty Principle
Physics ⇒ Modern Physics
Uncertainty Principle starts at 11 and continues till grade 12.
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See sample questions for grade 11
A particle has a momentum uncertainty of 1.0 \times 10^{-24} kg·m/s. What is the minimum uncertainty in its position? (Use \ell = 1.05 \times 10^{-34} J·s)
A photon has an energy uncertainty of 3.3 \times 10^{-19} J. What is the minimum uncertainty in the time interval during which this energy is measured? (Use \ell = 1.05 \times 10^{-34} J·s)
A proton is confined within a nucleus of radius 1.0 \times 10^{-15} m. Estimate the minimum uncertainty in its momentum. (Use \ell = 1.05 \times 10^{-34} J·s)
Calculate the minimum uncertainty in the momentum of a particle if the uncertainty in its position is 1.0 \times 10^{-10} m. (Use \ell = 1.05 \times 10^{-34} J·s)
Describe how the Uncertainty Principle affects the concept of an electron's orbit in the Bohr model.
Describe one real-world application of the Uncertainty Principle.
Describe the impact of the Uncertainty Principle on the measurement of a particle's velocity and position.
Explain how the Uncertainty Principle leads to the concept of zero-point energy.
Explain the significance of the Uncertainty Principle in quantum mechanics.
Explain why electrons in an atom do not spiral into the nucleus, using the Uncertainty Principle.
Explain why the Uncertainty Principle is not noticeable in everyday life.
If a particle is localized to a very small region in space, what can be said about its momentum?
If the uncertainty in energy of a system is 2.0 \times 10^{-20} J, what is the minimum uncertainty in time? (Use \ell = 1.05 \times 10^{-34} J·s)
If the uncertainty in the energy of a system is decreased, what happens to the uncertainty in the time interval?
If the uncertainty in the position of a particle is doubled, what happens to the minimum uncertainty in its momentum?
If the uncertainty in the position of an electron is reduced, what happens to the uncertainty in its momentum?
State the mathematical expression of Heisenberg's Uncertainty Principle for position and momentum.
Who first formulated the Uncertainty Principle?
