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Explore the behavior of particles in quantum wave mechanics, including their speeds, positions, and quantum numbers. Understand the concept of forbidden regions and the phenomenon of tunneling.
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Three de Broglie waves are shown for particles of equal mass. Rank in order, from largest to smallest, the speeds of particles a, b, and c. 1. va = vb > vc 2. vb > va > vc 3. vb > va = vc 4. vc > va > vb 5. vc > va = vb
Three de Broglie waves are shown for particles of equal mass. Rank in order, from largest to smallest, the speeds of particles a, b, and c. 1. va = vb > vc 2. vb > va > vc 3. vb > va = vc 4. vc > va > vb 5. vc > va = vb
A particle in a rigid box in the n = 2 stationary state is most likely to be found 1. One-quarter of the way from either end. 2. One-third of the way from either end. 3. In the center of the box. 4. It is equally likely to be found at any point in the box.
A particle in a rigid box in the n = 2 stationary state is most likely to be found 1. One-quarter of the way from either end. 2. One-third of the way from either end. 3. In the center of the box. 4. It is equally likely to be found at any point in the box.
This is a wave function for a particle in a finite quantum well. What is the particle’s quantum number? 1. n = 1 2. n = 2 3. n = 3 4. n = 4 5. n = 5
This is a wave function for a particle in a finite quantum well. What is the particle’s quantum number? 1. n = 1 2. n = 2 3. n = 3 4. n = 4 5. n = 5
For which potential energy is this an appropriate n = 4 wave function? (1) (2) (3) (4)
For which potential energy is this an appropriate n = 4 wave function? (1) (2) (3) (4)
Which probability density represents a quantum harmonic oscillator with 1. a 2. b 3. c 4. d
Which probability density represents a quantum harmonic oscillator with 1. a 2. b 3. c 4. d
A particle with energy E approaches an energy barrier with height U0 > E. If U0 is slowly decreased, the probability that the particle reflects from the barrier 1. Decreases. 2. Increases. 3. Does not change.
A particle with energy E approaches an energy barrier with height U0 > E. If U0 is slowly decreased, the probability that the particle reflects from the barrier 1. Decreases. 2. Increases. 3. Does not change.
Chapter 40 Reading Quiz
A quantum particle can pass through a region of space that would be forbidden to a classical particle. What is the name of this process? 1. Teleportation 2. Vacuum decay 3. Lasing 4. Trapping 5. Tunneling
A quantum particle can pass through a region of space that would be forbidden to a classical particle. What is the name of this process? 1. Teleportation 2. Vacuum decay 3. Lasing 4. Trapping 5. Tunneling
A particle in the ground state of a potential energy well • 1. is at rest. • 2. has a zero-point motion. • 3. is equally probable to be found at any point inside the well. • 4. has a wave function that is zero at all points. • 5. has zero energy.
A particle in the ground state of a potential energy well • 1. is at rest. • 2. has a zero-point motion. • 3. is equally probable to be found at any point inside the well. • 4. has a wave function that is zero at all points. • 5. has zero energy.
Which of these was not analyzed in this chapter? 1. A particle in a capacitor 2. A particle in a finite potential well 3. A neutron in a nucleus 4. An electron in an atom 5. An electron in a quantum-well device
Which of these was not analyzed in this chapter? 1. A particle in a capacitor 2. A particle in a finite potential well 3. A neutron in a nucleus 4. An electron in an atom 5. An electron in a quantum-well device
