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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. Regarding mirror-symmetry, Greene's work proved that _____.
(a) It occurs only below the Planck length.
(b) It is a part of string theory.
(c) It is only valid under special circumstances.
(d) It is invalid.

2. Which of the following is true about the tension within a string?
(a) It is very high, more than a billion tons.
(b) It has no bearing on a string's energy.
(c) It cannot be said truly to exist.
(d) It is very low, less than a few pounds.

3. What property did the double-slit experiment demonstrate that light has?
(a) It behaves as a wave.
(b) It can be bent by gravity fields.
(c) It has an infinite number of possible frequencies.
(d) It has a finite energy level at all frequencies.

4. Who discovered the theory of general relativity?
(a) Isaac Newton.
(b) Max Planck.
(c) Richard Feynman.
(d) Albert Einstein.

5. What does the string coupling constant govern?
(a) The strength of links between strings.
(b) The relative length of threading between strings.
(c) The likelihood of strings joining or separating.
(d) The number of strings that can be joined at once.

Short Answer Questions

1. By what factor is the minimum mass of a wrapped string in determined?

2. What prevents the potentially dangerous effects of an exposed tear in space-time?

3. What is the result when a particle of matter and a particle of antimatter are brought into contact?

4. Riemannian geometry describes the following objects: _____.

5. Which one of the following do physicists believe occurs at the central point of a black hole?

(see the answer key)

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