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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter Fifteen, Prospects.

Multiple Choice Questions

1. How are the amplitude of a string's vibration and the mass of the particle it represents related?
(a) The higher the amplitude, the less massive the particle.
(b) If there is a non-zero amplitude, the particle is massless.
(c) Amplitude and mass are not related.
(d) The higher the amplitude, the more massive the particle.

2. What is M-theory?
(a) An open-ended string theory.
(b) A combination of general relativity and string theory.
(c) A specialized version of the "Heterotic A" string theory.
(d) A theory that would unite all branches of string theory.

3. According to special relativity, which of the following is true about the passage of time for an observer moving near the speed of light?
(a) Time would pass very quickly compared to an observer at rest.
(b) No time would pass at all.
(c) The passage of time could not be predicted.
(d) Time would pass slowly compared to an observer at rest.

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

5. Which of the following is NOT an actual version of string theory?
(a) Type IIA theory.
(b) Type I theory.
(c) Heterotic type O(32) theory.
(d) Fermionic type IV theory.

Short Answer Questions

1. What is the shape of all particles, at the smallest possible level, according to string theory?

2. When the distance between two objects is doubled, what happens to the strength of the gravitational pull between them?

3. How many family groups are the elementary particles divided into?

4. In M-theory, what role does duality play?

5. Which of the following accurately describes the phenomenon of "quantum tunneling"?

(see the answer key)

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