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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 3, Of Warps and Ripples.

Multiple Choice Questions

1. Black holes are dense and massive cosmological bodies. What unique distinction do they have?
(a) Neutrinos always flow towards them.
(b) They are the only objects that emit gamma rays.
(c) They are the only types of stars that can produce uranium and heavier elements.
(d) Light cannot escape their gravitational well.

2. Which of the following is correct about the speed at which light moves?
(a) It moves at a constant speed for all observers.
(b) Its speed depends on the observer.
(c) It moves at a constant speed only near a gravitational field.
(d) It moves faster at higher energy levels.

3. What is the fundamental particle, the smallest possible bundle of energy, for the electromagnetic force?
(a) The electron.
(b) The gluon.
(c) The neutrino.
(d) The photon.

4. According to special relativity, which of the following is true about the passage of time for an observer moving near the speed of light?
(a) The passage of time could not be predicted.
(b) Time would pass very quickly compared to an observer at rest.
(c) No time would pass at all.
(d) Time would pass slowly compared to an observer at rest.

5. Two theories form the basis of modern physics, but are incompatible with one another. String theory attempts to reconcile these fields. What are these two theories?
(a) Quantum mechanics and the photoelectric effect.
(b) Gravity and general relativity.
(c) General relativity and special relativity.
(d) General relativity and quantum mechanics.

Short Answer Questions

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

2. According to general relativity, all objects that have mass have what effect on space-time?

3. In the 1800s, James Clerk Maxwell used a new mathematical framework to unite _____.

4. When the distance between two objects is doubled, what happens to the strength of the gravitational pull between them?

5. What is the shape of all particles, at the smallest possible level, according to string theory?

(see the answer key)

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