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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 wave-like nature of the electron means that after a collision, _____.
(a) The electron can never be located again.
(b) The electron will disperse into a wave of energy.
(c) The electron will double in frequency.
(d) The electron has a range of possible locations.

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

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

4. The extra dimension or dimensions in M-theory are needed in order to incorporate _____.
(a) Electroweak duality.
(b) Supergravity.
(c) Electromagnetism.
(d) Unwound Calabi-Yau spaces.

5. Kaluza's theory suggested that electromagnetism was carried by ripples in _____.
(a) All dimensions of both space and time.
(b) The three normal space dimensions.
(c) The time-dimension only.
(d) The "curled up" dimensions.

Short Answer Questions

1. What is supergravity?

2. Who first proposed the existence of extra dimensions?

3. In M-theory, what is a two-dimensional oscillating object is called?

4. What is the importance of the string-coupling constant?

5. What are the characteristics of a wave?

(see the answer key)

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