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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. Which physicist is credited with discovering that light is composed of particles?
(a) Planck.
(b) Einstein.
(c) Rutherford.
(d) Maxwell.

2. Under string theory, which of the following is true regarding extra dimensions?
(a) Some or all of them might be time-dimensions.
(b) They must all be space-dimensions.
(c) They must all be space-dimensions, or they must all be time-dimensions.
(d) They must all be time-dimensions.

3. In M-theory, what role does duality play?
(a) It shows that the five theories are connected.
(b) It links electromagnetism and gravity.
(c) It allows space-tearing flop transitions to extend into extra dimensions.
(d) It helps to incorporate general relativity.

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

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

Short Answer Questions

1. Which of the following best describes the fate of Kaluza-Klein theory?

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

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

4. What does the string coupling constant govern?

5. Kaluza's theory suggested that electromagnetism was carried by ripples in _____.

(see the answer key)

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