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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter Fifteen, Prospects.

Multiple Choice Questions

1. Who discovered the theory of general relativity?
(a) Richard Feynman.
(b) Albert Einstein.
(c) Max Planck.
(d) Isaac Newton.

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

3. Why can the objects predicted by string theory not be observed?
(a) Current magnification is at least 17 times too wide.
(b) The objects exist only in other dimensions.
(c) Light does not exist at the scales involved.
(d) The objects are not composed of matter.

4. Why are the extra dimensions needed in string theory?
(a) To provide more space for strings.
(b) To remove time from its equations.
(c) To prevent the negative and infinite answers to its physical equations.
(d) To account for the infinite-energy problem.

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

Short Answer Questions

1. According to general relativity, the change that an object causes in the fabric of space-time depends directly on _____.

2. Which physicist is credited with discovering that light is composed of particles?

3. How many total dimensions are required by string theory?

4. Which of the following best describes a fermion?

5. Which of the following is NOT an actual version of string theory?

(see the answer key)

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