The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest For… Quiz | One Week Quiz A

Brian Greene
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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. The smallest possible unit of energy is referred to as _____.
(a) A muon.
(b) A quantum.
(c) A quark.
(d) A photon.

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

3. What is a virtual string pair?
(a) A quantum-entangled pair of unwound, massless strings.
(b) A pair of strings created purely in the curled-up dimensions.
(c) A pair of strings that cancel each other out and therefore do no correspond to real particles.
(d) A short-lived pair of strings resulting from a normal string splitting momentarily.

4. What is one possible way that the three dimensions we observe could have been "stretched out"?
(a) Vacuum energy.
(b) A false vacuum event.
(c) The big bang.
(d) Quantum fluctuations.

5. 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 _____.
(a) The oven contains infinite energy.
(b) The oven can only store energy if it has no mass.
(c) The oven contains no energy.
(d) The oven can store more energy the smaller it is.

Short Answer Questions

1. How does the number of extra "curled up" dimensions affect the vibration of strings?

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

3. What is supergravity?

4. Who first proposed the existence of extra dimensions?

5. How does the shape of the extra "curled up" dimensions affect the vibration of strings?

(see the answer key)

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