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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter Twelve, Beyond Strings, In Search of M-Theory.

Multiple Choice Questions

1. Kaluza's theory suggested that electromagnetism was carried by ripples in _____.
(a) The three normal space dimensions.
(b) The time-dimension only.
(c) The "curled up" dimensions.
(d) All dimensions of both space and time.

2. Under string theory, which of the following is true regarding extra dimensions?
(a) Some or all of them might be time-dimensions.
(b) They must all be space-dimensions, or they must all be time-dimensions.
(c) They must all be space-dimensions.
(d) They must all be time-dimensions.

3. In M-theory, what role does duality play?
(a) It shows that the five theories are connected.
(b) It links electromagnetism and gravity.
(c) It helps to incorporate general relativity.
(d) It allows space-tearing flop transitions to extend into extra dimensions.

4. What are the characteristics of a wave?
(a) Frequency, wavelength, and amplitude.
(b) Energy level, polarity, and speed.
(c) Frequency, polarity, and wavelength.
(d) Amplitude and energy.

5. Which of the following accurately describes the phenomenon of "quantum tunneling"?
(a) Particles can sometimes "borrow" energy to move in ways impossible in classical physics.
(b) High-energy waves can penetrate the fabric of space-time for very short periods of time.
(c) Some particles are linked together, no matter how much space separates them.
(d) Particles with high energy can vanish in one location, instantly appearing in another.

Short Answer Questions

1. Which of the following best describes the fate of Kaluza-Klein theory?

2. What is the importance of the string-coupling constant?

3. The extra dimension or dimensions in M-theory are needed in order to incorporate _____.

4. Richard Feynman's "sum over paths" theory states that in the double-slit experiment, an electron behaves in what way?

5. What is strong-weak duality?

(see the answer key)

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