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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. According to Einstein's theory of general relativity, 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?
(a) Instantaneously.
(b) At exactly the speed of light.
(c) Near the speed of light, faster for lighter objects.
(d) Near the speed of light, faster for more massive objects.

3. General relativity is incompatible with _____.
(a) The photoelectric effect.
(b) The big bang theory.
(c) Quantum mechanics.
(d) State theory.

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

5. What characteristic of the string determines the properties of the particle it represents?
(a) The number of other strings with which it is threaded.
(b) Its frequency of vibration.
(c) Its mass.
(d) Its length.

Short Answer Questions

1. Who discovered the theory of general relativity?

2. Which of the following is not one of the four fundamental forces of the universe?

3. Edwin Hubble used Einstein's theories to show that the fabric of the universe _____.

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

5. What type of a wave is light?

(see the answer key)

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