Virtual Labs

Quantum Tunnelling Through Potential Barrier

1. After conducting the simulation, if the Transmission % was 35% and Reflection % was 65%, what is the transmission coefficient T?

a: 0.35 Explanation

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b: 0.65 Explanation

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c: 1.00 Explanation

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d: 0.30 Explanation

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2. In the 'Easy Tunnel' preset scenario, why is the transmission percentage high?

a: Because barrier width is very large Explanation

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b: Because particle energy (E) is high relative to barrier height (V₀) Explanation

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c: Because the simulation speed is faster Explanation

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d: Because the grid is enabled Explanation

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3. When you varied the Barrier Width from 10 to 50 while keeping E and V₀ constant, what pattern did you observe?

a: Transmission increased linearly Explanation

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b: Transmission decreased exponentially Explanation

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c: Transmission remained constant Explanation

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d: Transmission oscillated randomly Explanation

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4. In the simulation, what happens to the wavefunction inside the potential barrier?

a: It oscillates with constant amplitude Explanation

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b: It becomes zero immediately Explanation

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c: It decreases exponentially Explanation

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d: It increases exponentially Explanation

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5. In the 'Classical' preset where E > V₀, what did you observe?

a: No wave passed through Explanation

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b: High transmission but still some reflection (quantum effect) Explanation

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c: Exactly 100% transmission Explanation

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d: The simulation stopped working Explanation

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6. Based on your graph of Barrier Width vs Transmission %, which mathematical relationship best describes the curve?

a: Linear: T = -mL + c Explanation

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b: Quadratic: T = aL² Explanation

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c: Exponential decay: T = e^(-2κL) Explanation

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d: Logarithmic: T = log(L) Explanation

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7. What real-world phenomenon is directly explained by quantum tunnelling?

a: Planetary motion around the Sun Explanation

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b: Alpha particle emission in radioactive decay Explanation

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c: Reflection of light from a mirror Explanation

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d: Magnetic compass pointing north Explanation

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8. In the 'Step Potential' preset, what unique behavior did you observe?

a: Complete transmission of the wave Explanation

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b: Wave reflection at the discontinuity with no transmitted wave beyond Explanation

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c: The wave disappeared completely Explanation

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d: Barrier width had no effect Explanation

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9. When you increased particle energy (E) while keeping V₀ and L constant, what trend did you observe in Transmission %?

a: Transmission decreased Explanation

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b: Transmission increased Explanation

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c: Transmission remained constant Explanation

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d: Transmission oscillated randomly Explanation

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10. Based on your experimental data, which scenario showed the highest Transmission %?

a: Hard Tunnel (Low E, High V₀) Explanation

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b: Wide Barrier (Large L) Explanation

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c: Easy Tunnel (High E, Low V₀) Explanation

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d: Step Potential (Infinite Width) Explanation

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