The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest For… Test | Mid-Book Test - Easy

Brian Greene
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This test consists of 15 multiple choice questions and 5 short answer questions.

Multiple Choice Questions

1. The first version of string theory did not include any particles of _____.
(a) Messenger particles.
(b) Bosons.
(c) Gravitons.
(d) Fermions.

2. What rule did Max Planck discover the electromagnetic waves bounded in a container, such as an oven, must follow?
(a) They must have a whole number of peaks and troughs that fit perfectly inside the container.
(b) There must be an even number of peaks and troughs.
(c) The frequencies of the waves must all be the same.
(d) The energies of all waves inside the over must cancel out to zero.

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

4. Which of the following is closest to the Planck length?
(a) A billionth of a billionth of a centimeter.
(b) A thousandth of a centimeter.
(c) A millionth of a centimeter.
(d) A millionth of a billionth of a billionth of a billionth of a centimeter.

5. What does the quantum electroweak theory state about the two fundamental forces it describes?
(a) At extreme energy and temperature conditions, they become the same thing.
(b) They only interact at the Planck length and below.
(c) They are identical at quantum scales.
(d) In four-dimensional space, they are the same thing.

6. What discovery about string theory triggered the "superstring revolution"?
(a) It was found to encompass the four fundamental forces of matter.
(b) It was experimentally confirmed at Fermilab in the US.
(c) Its approximate equations were solved for the first time.
(d) Einstein announced that it exactly matched his formulas for general relativity.

7. Which of the following did Einstein considered time?
(a) A physical substance, composed of particles.
(b) The fifth fundamental force of the universe.
(c) A three-dimensional field.
(d) A fourth dimension, alongside the three spatial dimensions.

8. Which of the following is true of a particle's spin?
(a) It is constant for that particle.
(b) It increases with each interaction with a particle of greater spin.
(c) It depends on the strength of the local magnetic field.
(d) It changes depending on the particle's energy.

9. The advent of fermionic vibrational patterns resulted in the creation of _____.
(a) Supersymmetric quantum field theory.
(b) Quantum electroweak theory.
(c) Symmetric antistring theory.
(d) Fermionic resonance theory.

10. What would an outside observer notice about an object moving near the speed of light?
(a) It would appear to move slower near a gravitational field.
(b) It would not be observable under any circumstances.
(c) It would appear vastly larger than it would at rest.
(d) It would be shorted in the direction of its movement.

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

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

13. Einstein's equation, E=mc^2, states that which of the following are equivalent?
(a) Light and magnetism.
(b) Energy and light.
(c) Energy and mass.
(d) Electricity and magnetism.

14. Which of the following theory was NOT developed in order to try to resolve the conflicts between quantum mechanics and general relativity?
(a) Inflationary theory.
(b) Quantum field theory.
(c) Quantum electrodynamics.
(d) Superstring theory.

15. 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) Time would pass slowly compared to an observer at rest.
(b) The passage of time could not be predicted.
(c) No time would pass at all.
(d) Time would pass very quickly compared to an observer at rest.

Short Answer Questions

1. According to general relativity, which of the following is said to warp or bend space-time?

2. Which of the following is true about the tension within a string?

3. What is the Planck mass?

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

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

(see the answer keys)

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