Virtual Labs

Quantum Tunnelling Through Potential Barrier

1. What is the phenomenon called when particles penetrate potential energy barriers that would be classically impossible?

a: Reflection Explanation

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b: Dispersion Explanation

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c: Quantum Tunnelling Explanation

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d: Absorption Explanation

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2. Which equation describes the behavior of particles encountering potential barriers in quantum mechanics?

a: Newton's Second Law Explanation

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b: Maxwell's Equations Explanation

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c: Schrödinger Equation Explanation

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d: Planck's Equation Explanation

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3. What happens to the tunnelling probability when the width of the potential barrier increases?

a: It increases exponentially Explanation

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b: It decreases exponentially Explanation

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c: It becomes infinite Explanation

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d: It remains constant Explanation

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4. In the simulation, what does the 'Transmission %' indicate?

a: Percentage of wave reflected back Explanation

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b: Energy of the particle Explanation

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c: Percentage of wave that passed through the barrier Explanation

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d: Width of the barrier Explanation

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5. Which factor increases the likelihood of quantum tunnelling?

a: Lower particle energy (E) Explanation

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b: Higher barrier height (V₀) Explanation

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c: Smaller barrier width (L) Explanation

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d: Larger particle mass Explanation

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6. What is the transmission coefficient formula for quantum tunnelling?

a: T = E × V₀ Explanation

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b: T = e^(-2κL) Explanation

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c: T = L / V₀ Explanation

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d: T = E + V₀ Explanation

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7. In the simulation, what does the 'Density' display mode show?

a: Real and imaginary parts of the wavefunction Explanation

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b: Probability density |Ψ|² with phase as color Explanation

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c: Only the barrier region Explanation

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d: Energy levels Explanation

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8. What happens to the tunnelling probability when the barrier height (V₀) increases?

a: It increases Explanation

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b: It decreases Explanation

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c: It remains constant Explanation

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d: It becomes infinite Explanation

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9. Which of the following applications uses quantum tunnelling?

a: Scanning Tunnelling Microscope (STM) Explanation

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b: Traditional light microscope Explanation

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c: Radio transmission Explanation

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d: Sound amplification Explanation

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10. In quantum mechanics, what does the wavefunction Ψ represent?

a: The exact position of a particle Explanation

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b: The probability amplitude of finding a particle Explanation

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c: The speed of the particle Explanation

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d: The mass of the particle Explanation

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