Chapter 40

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. a2. b3. c4. d

Which probability density represents a quantum

harmonic oscillator with

1. a2. b3. c4. d

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.

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

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. Teleportation2. Vacuum decay3. Lasing4. Trapping5. 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. Teleportation2. Vacuum decay3. Lasing4. Trapping5. 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 capacitor2. A particle in a finite potential well3. A neutron in a nucleus4. An electron in an atom5. An electron in a quantum-well device

Which of these was not analyzed in this chapter?

1. A particle in a capacitor2. A particle in a finite potential well3. A neutron in a nucleus4. An electron in an atom5. An electron in a quantum-well device