1. What is the fundamental particle, the smallest possible bundle of energy, for the electromagnetic force?
(a) The neutrino.
(b) The photon.
(c) The electron.
(d) The gluon.

2. Which of the following is true regarding tears in space time occurring in normal three-dimensional space?
(a) Such tears have been observed in particle accelerators.
(b) It is unknown whether or not they can occur.
(c) It has been proven that they can occur.
(d) They cannot occur.

3. Which of the following is one of the major problems in using both quantum physics and general relativity?
(a) At small scales, quantum physics predicts uncertainty, but general relativity requires certainty.
(b) General relativity is time-dependant, quantum physics is a steady-state theory.
(c) General relativity is a wave theory, but quantum physics is a particle theory.
(d) Quantum physics predicts that all particles are massless.

4. Which of the following best describes the fate of Kaluza-Klein theory?
(a) It became the mathematical basis of general relativity.
(b) It became widespread for a short time, but receives almost no attention now.
(c) It was quickly discarded as meaningless, but rediscovered by string theory.
(d) It was updated through the 1970s, and eventually incorporated into string theory.

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. Quantum physics began with the study of the energy inside a heated, closed container, such as an oven. The problem with theories at the time was that they predicted that _____.

2. Which of the following is a correct statement, based on the theory of special relativity?

3. Who discovered the theory of general relativity?

4. Which of the following is NOT a property that is used to define both black holes and elementary particles?

5. The wave-like nature of the electron means that after a collision, _____.

(see the answer key)

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