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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 6, Nothing but Music, The Essentials of Superstring Theory.

Multiple Choice Questions

1. Which of the following theory was NOT developed in order to try to resolve the conflicts between quantum mechanics and general relativity?
(a) Superstring theory.
(b) Quantum electrodynamics.
(c) Quantum field theory.
(d) Inflationary theory.

2. When the distance between two objects is doubled, what happens to the strength of the gravitational pull between them?
(a) It diminishes to one-half its original value.
(b) It is unchanged.
(c) It diminishes to one-fourth its original value.
(d) It quadruples.

3. In 1968 it was discovered that protons and neutrons are composed of which type of particle?
(a) Muons.
(b) Baryons.
(c) Neutrinos.
(d) Quarks.

4. The smallest possible unit of energy is referred to as _____.
(a) A quantum.
(b) A muon.
(c) A quark.
(d) A photon.

5. What is the Planck tension?
(a) The pull between strings at the Planck length.
(b) The attraction felt by a string through the strong force.
(c) The vacuum-energy of a matter and anti-matter string pair.
(d) The typical tension in a string.

Short Answer Questions

1. According to Newton's theory of gravity, if two objects have a gravitational pull on one another, and one changes its mass or distance from the other, how quickly does the effect of this change travel to the other object?

2. Which of the following is a correct statement, based on the theory of special relativity?

3. According to Newton's law of gravity, the strength of the pull between two objects depends on what factors?

4. Black holes are dense and massive cosmological bodies. What unique distinction do they have?

5. What is the photoelectric effect?

(see the answer key)

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