The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest For… Test | Final Test - Medium

Brian Greene
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This test consists of 5 multiple choice questions, 5 short answer questions, and 10 short essay questions.

Multiple Choice Questions

1. Tears in space-time are technically termed _____.
(a) Discrete abrogation events.
(b) Zero-point alignments.
(c) Topology-changing transitions.
(d) Flops.

2. What is a string's winding number?
(a) The ratio of its Planck tension to its tension at rest.
(b) The number of times it is wrapped around a circular dimension.
(c) The number of other strings it is threaded with.
(d) The number of dimensions it vibrations through.

3. How many dimensions are necessitated by M-theory?
(a) Eight.
(b) Eleven.
(c) Nine.
(d) Ten.

4. What problem of cosmology was the inflationary model created to deal with?
(a) The universe is too large to support its own expansion.
(b) The cosmic background radiation is uniform, and shouldn't be.
(c) The universe is too small to support its own expansion.
(d) The cosmic background is not uniform, and should be.

5. About how long did the "primordial synthesis" stage of the big bang last?
(a) Three minutes.
(b) One picosecond.
(c) Four seconds.
(d) Two years.

Short Answer Questions

1. As a string becomes wrapped, which of its properties increases?

2. Who provided the computer programming to process the results of the Morrison-Greene experiment?

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

4. The method of tearing space-time discovered by Greene and others is called _____.

5. What is the collapse and reformation of a Calabi-Yau shape called?

Short Essay Questions

1. Describe the entire process of a conifold transition.

2. How is the shape of the Calabi-Yau space is determined?

3. In the context of the big bang, what is symmetry breaking?

4. Describe the difficulties in studying the entropy of a black hole.

5. What is the string-coupling constant, and why is it important?

6. Greene suggests that black holes are very similar to, and might in fact be, elementary particles. What evidence supports this suggestion?

7. What is the strong-weak duality?

8. What is mirror symmetry, and what is its relevance to string theory?

9. Describe the state of the universe's expansion, including what its ultimate fate might be.

10. Describe the phenomenon of winding in string theory.

(see the answer keys)

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