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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 4, Microscopic Weirdness.

Multiple Choice Questions

1. Which of the following is not true according to special relativity?
(a) All objects move at a constant speed through space-time.
(b) No object can move faster than the speed of light.
(c) Time does not pass for objects that are perfectly at rest.
(d) Motion and time are relative; they depend on the observer.

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

3. Richard Feynman's "sum over paths" theory states that in the double-slit experiment, an electron behaves in what way?
(a) It follows all possible paths at the same time.
(b) The sum of all possible frequencies describes the frequency of the final path taken.
(c) It follows a unique path every time.
(d) It follows the same path every time.

4. Which of the following is not one of the four fundamental forces of the universe?
(a) The nuclear-weak force.
(b) The electromagnetic force.
(c) The photoelectric force.
(d) Gravity.

5. How can black holes be detected?
(a) With an ultraviolet-range telescope.
(b) By looking for dark gaps in clusters of stars.
(c) By observing the directions of solar winds.
(d) By their effects on objects around them.

Short Answer Questions

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

2. 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?

3. What property did the double-slit experiment demonstrate that light has?

4. What characteristic of the string determines the properties of the particle it represents?

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

(see the answer key)

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