The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest For… Quiz | Eight Week Quiz E

Brian Greene
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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter Ten, Quantum Geometry.

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 all possible paths at the same time.
(c) It follows the same path every time.
(d) It follows a unique path every time.

2. What discovery was made that incorporated gravitational force into quantum mechanics via string theory?
(a) At extremely small scales, gravity is fused with the strong force.
(b) A vibrational pattern with the properties of the graviton was discovered.
(c) Gravity could be made symmetric only if the graviton is a string.
(d) Gravity was found to be supersymmetric.

3. What is the fundamental force responsible for keeping the nucleus of an atom "glued" together?
(a) The nuclear-strong force.
(b) Potential electrical force.
(c) Quantum-tunneling force.
(d) Gravitational force.

4. In Einstein's famous equation, E=mc^2, what does "c" represent?
(a) The object's density.
(b) The speed of light.
(c) The frequency of light.
(d) The speed of the object.

5. Quantum electroweak theory concerns quantum mechanics and _____.
(a) The strong force.
(b) Gravity.
(c) The electromagnetic force.
(d) The weak force.

Short Answer Questions

1. How many dimensions did the tiny objects involved in the original statement of string theory have?

2. What metric best approximates the scales at which extra dimensions would have a major impact?

3. Which of the following qualities must a physical law have in order to be considered symmetric?

4. Which of the follow best describes a boson?

5. According to string theory, why do different particles have different properties?

(see the answer key)

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