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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. Richard Feynman's "sum over paths" theory states that in the double-slit experiment, an electron behaves in what way?
(a) The sum of all possible frequencies describes the frequency of the final path taken.
(b) It follows the same path every time.
(c) It follows all possible paths at the same time.
(d) It follows a unique path every time.

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

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

4. What is the photoelectric effect?
(a) Photons can spontaneously decay into electrons in powerful magnetic fields.
(b) Electrons and photons only interact if they have the same frequency.
(c) Electrons follow quantum paths made by photons.
(d) When light shines on metals, the metals emit electrons.

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

Short Answer Questions

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

2. Who posited the existence of M-theory?

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

4. What are the characteristics of a wave?

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

(see the answer key)

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