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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. General relativity is incompatible with _____.
(a) Quantum mechanics.
(b) State theory.
(c) The big bang theory.
(d) The photoelectric effect.

2. What is quantum foam?
(a) The mixture of short-lived particles observed after a matter and anti-matter collision.
(b) The faint material ejected by black holes.
(c) Particles that are scattered from their normal positions by quantum interference.
(d) The rapidly changing spatial distortions at the Planck length.

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

4. According to general relativity, the change that an object causes in the fabric of space-time depends directly on _____.
(a) Its direction compared to the observer.
(b) Its mass.
(c) Its density.
(d) Its proximity to another massive body.

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

Short Answer Questions

1. What would an outside observer notice about an object moving near the speed of light?

2. Which of the following is closest to the Planck length?

3. What characteristic did Werner Heisenberg discovered that some features of the universe at very small scales, and some properties of particle?

4. Edwin Hubble used Einstein's theories to show that the fabric of the universe _____.

5. Which of the following did Einstein considered time?

(see the answer key)

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