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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter Fifteen, Prospects.

Multiple Choice Questions

1. In which particle was spin first discovered?
(a) The proton.
(b) The neutron.
(c) The photon.
(d) The electron.

2. At what scale of length is quantum geometry necessitated?
(a) Cosmological scales.
(b) The Riemann scale.
(c) The Planck length.
(d) Nanometers.

3. What type of a wave is light?
(a) A gravitational wave.
(b) An electrical wave.
(c) A photonic wave.
(d) An electromagnetic wave.

4. In what important way does string theory affect the cosmological model of the big bang?
(a) The universe started at a certain minimum size.
(b) The big bang could have created multiple universes.
(c) The universe is infinite, but has no boundaries.
(d) The big bang created strings, not particles.

5. What is the photoelectric effect?
(a) Electrons follow quantum paths made by photons.
(b) When light shines on metals, the metals emit electrons.
(c) Electrons and photons only interact if they have the same frequency.
(d) Photons can spontaneously decay into electrons in powerful magnetic fields.

Short Answer Questions

1. Why are the extra dimensions needed in string theory?

2. According to the standard model of the big bang, which of the following is true of the four fundamental forces during the first moments of the universe?

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

4. What problem of cosmology was the inflationary model created to deal with?

5. How many family groups are the elementary particles divided into?

(see the answer key)

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