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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. In M-theory, what is a two-dimensional oscillating object is called?
(a) A membrane.
(b) A two-string.
(c) A blob.
(d) A flop.

2. In string theory, how do strings interact?
(a) By resonating with each other.
(b) By colliding and tangling.
(c) By threading.
(d) By joining and splitting.

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

4. How does the shape of the extra "curled up" dimensions affect the vibration of strings?
(a) Only the wavelength of the vibration is affected.
(b) The shape does not affect the vibrational patterns.
(c) Only the total energy of the vibration is affected.
(d) The shape determines what types of vibrations are possible.

5. How many total dimensions are required by string theory?
(a) Five.
(b) Eight.
(c) Seven.
(d) Ten.

Short Answer Questions

1. What property of electromagnetic waves did Max Planck solve the thermodynamic problem of the oven by discovering?

2. What is supergravity?

3. Who posited the existence of M-theory?

4. What is the photoelectric effect?

5. Why are the extra dimensions needed in string theory?

(see the answer key)

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