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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 5, The Need for a New Theory, General Relativity vs. Quantum Mechanics.

Multiple Choice Questions

1. 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) Near the speed of light, faster for lighter objects.
(b) At exactly the speed of light.
(c) Instantaneously.
(d) Near the speed of light, faster for more massive objects.

2. Quantum chromodynamics concerns quantum mechanics and ____.
(a) Gravity.
(b) The electromagnetic force.
(c) The strong force.
(d) The weak force.

3. According to general relativity, all objects that have mass have what effect on space-time?
(a) They fold space-time as they move past one another.
(b) They tear space-time when they travel at near-light speeds.
(c) They stretch space-time for other very distant objects.
(d) They warp space-time around them.

4. What type of motion cannot be felt or sensed by the moving observer?
(a) Orbital movement around a star.
(b) Constant-velocity movement.
(c) Accelerating movement.
(d) Slowing or decelerating movement.

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

Short Answer Questions

1. Which of the following is not true according to special relativity?

2. Which of the following accurately describes the phenomenon of "quantum tunneling"?

3. 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?

4. What is the quantum, or messenger particle, of the strong force?

5. Which physicist is credited with discovering that light is composed of particles?

(see the answer key)

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