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

2. Which of the following theory was NOT developed in order to try to resolve the conflicts between quantum mechanics and general relativity?
(a) Inflationary theory.
(b) Quantum electrodynamics.
(c) Quantum field theory.
(d) Superstring theory.

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

4. According to Einstein's theory of general relativity, if two objects have a gravitational pull on one another, and one changes its mass or distance from the other, how quickly does the effect of this change travel to the other object?
(a) At exactly the speed of light.
(b) Instantaneously.
(c) Near the speed of light, faster for lighter objects.
(d) Near the speed of light, faster for more massive objects.

5. Which of the following is true regarding the mass and spin of a pair of superpartners?
(a) They have unrelated masses, and their spins differ by 1.
(b) They have the same mass, and their spins differ by 1/2.
(c) Their masses and spins are not related.
(d) They have the same mass and spin.

Short Answer Questions

1. What is one possible way that the three dimensions we observe could have been "stretched out"?

2. Kaluza-Klein theory units which two fundamental forces?

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

4. Which of the following is one of the difficulties in observing super particles?

5. If a clock were accelerated to nearly the speed of light for a year's time, which of the following would be true of its reading at the end of that time?

(see the answer key)

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