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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. What is strong-weak duality?
(a) The relationship between bosonic-strong string theories and bosonic-weak theories.
(b) A relationship between the strong and weak coupling constants in two different string theories.
(c) The union of the strong and weak forces at high energies.
(d) The coupling of strong and weak forces in M-theory.

2. The wave-like nature of the electron means that after a collision, _____.
(a) The electron has a range of possible locations.
(b) The electron can never be located again.
(c) The electron will double in frequency.
(d) The electron will disperse into a wave of energy.

3. How does the number of extra "curled up" dimensions affect the vibration of strings?
(a) More dimensions provide more ways to vibrate.
(b) More dimensions allow for string with length in more than one direction.
(c) String vibration is not affected by additional dimensions.
(d) More dimensions require more energy for the same vibrational pattern.

4. Richard Feynman's "sum over paths" theory states that in the double-slit experiment, an electron behaves in what way?
(a) It follows all possible paths at the same time.
(b) It follows the same path every time.
(c) It follows a unique path every time.
(d) The sum of all possible frequencies describes the frequency of the final path taken.

5. 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 time-dimensions.
(c) They must all be space-dimensions.
(d) They must all be space-dimensions, or they must all be time-dimensions.

Short Answer Questions

1. What rule did Max Planck discover the electromagnetic waves bounded in a container, such as an oven, must follow?

2. Quantum physics began with the study of the energy inside a heated, closed container, such as an oven. The problem with theories at the time was that they predicted that _____.

3. What does the string coupling constant govern?

4. How many total dimensions are required by string theory?

5. What shape allows for the vibrational patterns that we observe in our universe?

(see the answer key)

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