AST 307 · Introductory Astronomy
Fall 2003


Chapter 4  Sep. 17-19

  1. Describe the appearance of a continuous spectrum, an emission- line spectrum, and an absorption-line spectrum.

  2. In what situations do each of these types of spectra occur?

  3. What is a photon? Are there waves in a photon, or photons in a light wave?

  4. State the relationship between the energy of a photon and the frequency or wavelength of the associated light wave.

  5. Describe the process by which a hydrogen atom emits or absorbs a photon.

  6. How does quantum theory explain the fact that atoms emit and absorb light of only certain discrete wavelengths?

  7. Describe two ways a molecule can emit radiation that differ from how an atom emits radiation.

19 September 2003
Astronomy Program · The University of Texas at Austin · Austin, Texas 78712
prospective student inquiries:
site comments: