Question 1

How has quantum mechanics revolutionized the physics community?

Accepted Answer

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Question 2

Why did quantum scientists, including Albert Einstein, one of the founders of quantum mechanics, find the research so disconcerting?

Accepted Answer

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Question 3

How do descriptions of the state of quantum objects differ from descriptions of every day objects?

Accepted Answer

A)  Descriptions of quantum objects are given in terms of probabilities. 
B)  Descriptions of quantum objects are stated with absolute certainty. 
C)  Descriptions of quantum objects can be given as a precise position and velocity. 
D)  Descriptions of quantum objects cannot be made at all. 
E)  Descriptions of quantum objects describe motion, while descriptions of everyday things never do.

Question 4

If electrons are like particles, then

Accepted Answer

A)  they can move according to Bohr's laws of motion. 
B)  they must have a precise frequency to stay in a stable orbit. 
C)  they must have a precise velocity to stay in a stable orbit. 
D)  they create interference patterns in the dual slit experiment. 
E)  all of these

Question 5

Why is the wave-particle duality typically confusing to the human mind?

Accepted Answer

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Question 6

A train with a mass of 100,000 kg is crossing a bridge that is 10 m long. What is the uncertainty in the velocity?

Accepted Answer

A)  -39 J-s/kg 
B)  > 6.63 X 10-40 m/s 
C)  > 6.63 X 10-39 m/s 
D)  -40 m/s 
E)  > 6.63 X 10-38 m/s

Question 7

Which of the following describes experiments scientists have used to determine whether quantum objects are waves or particles?

Accepted Answer

A)  experiments testing particle properties 
B)  experiments testing wave properties 
C)  double-slit tests 
D)  tests designed to "trick" the particles into revealing their identity 
E)  any or all of the experiments listed here would be a correct answer

Question 8

Why do we not have to worry about the uncertainty principle in our everyday life?

Accepted Answer

A)  The uncertainty principle has been refuted by new evidence. 
B)  Objects we normally encounter have mass in amounts that make the effects of the uncertainty principle practically non-existent. 
C)  Planck's constant has been revised to apply to the macroscopic world as well as the atomic world. 
D)  There is too much uncertainty in the uncertainty principle to give it much thought. 
E)  The future is determined by a Divine Calculator.

Question 9

If you were flipping two identical coins in two separate locations, what would be the result of those coin flips if the coins were somehow obeying the concept of quantum entanglement?

Accepted Answer

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Question 10

The principles of quantum mechanics state that

Accepted Answer

A)  Newtonian laws are incontrovertible. 
B)  the quantum world spins clockwise. 
C)  there must be an anti-quantum universe. 
D)  in the quantum world, prediction of the future is a probability. 
E)  the long-term evolution of physical systems can be predicted.

Exam 9: Quantum Mechanics: How Can the Electron Behave Like Both a Particle and a Wave