Uncertainty Principle
Physics ⇒ Modern Physics
Uncertainty Principle starts at 11 and continues till grade 12.
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See sample questions for grade 12
A particle is confined in a box of width 2.0 × 10-10 m. Estimate the minimum uncertainty in its momentum.
A particle is localized within a region of 1.0 × 10-12 m. Calculate the minimum uncertainty in its momentum. (Take ℏ = 1.05 × 10-34 J·s)
A photon has an energy uncertainty of 3.0 × 10-19 J. What is the minimum uncertainty in the time interval during which this energy is measured? (Take ℏ = 1.05 × 10-34 J·s)
Describe how the uncertainty principle explains the existence of zero-point energy.
Describe how the uncertainty principle limits the precision of simultaneous measurements of position and momentum.
Describe one experimental evidence that supports the uncertainty principle.
Explain the physical meaning of the uncertainty principle in your own words.
Explain the significance of the uncertainty principle in quantum mechanics.
Explain why the uncertainty principle is important for understanding the behavior of electrons in atoms.
Explain why the uncertainty principle is not noticeable in everyday life.
If the uncertainty in the energy of a particle is 2.0 × 10-20 J, what is the minimum uncertainty in the measurement of time? (Take ℏ = 1.05 × 10-34 J·s)
If the uncertainty in the position of a proton is 1.0 × 10-14 m, what is the minimum uncertainty in its momentum? (Take ℏ = 1.05 × 10-34 J·s)
If the uncertainty in the position of an electron is 1.0 × 10-10 m, what is the minimum uncertainty in its momentum? (Take ℏ = 1.05 × 10-34 J·s)
If Δx = 5.0 × 10-11 m for a particle, what is the minimum value of Δp? (Take ℏ = 1.05 × 10-34 J·s)
State the mathematical expression for Heisenberg's uncertainty principle relating position and momentum.
