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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. Why are the fluctuations that quantum physics predicts not observable in everyday life?
(a) Most fluctuations are canceled out by electromagnetic waves, like light.
(b) The human brain filters them out.
(c) On large scales, the effects cancel each other out.
(d) The fluctuations only occur in deep space.

2. How many dimensions did the tiny objects involved in the original statement of string theory have?
(a) Two.
(b) Four.
(c) One.
(d) Three.

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

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

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

Short Answer Questions

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

2. Which of the following is one of the major problems in using both quantum physics and general relativity?

3. How are the wavelength of a string's vibration and the mass of the particle it represents related?

4. In 1968 it was discovered that protons and neutrons are composed of which type of particle?

5. What is different about a particle of antimatter, compared to its normal counterpart?

(see the answer key)

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