AST 1002: "Study Guide" Table 8c

[Sections Taught by Prof. H.L. Cohen]

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Last updated January 1, 2003
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Table 8c. Basic Terms Relating to Spectra


Terms Relating to Producing Spectra

(Dispersion relates to "distributing" or "separating" while both refraction and diffraction relate to "turning," "bending" or "changing direction.")

Dispersion The separation of light either by refraction (uses a prism) or diffraction (uses a grating).
Refraction Change in direction of waves when passing
from one medium into another.		 Diffraction Change in direction of waves after passing
an obstacle.
Prism Grating


"S-Words" !

  • Spectrograph
 The instrument S-Words
  • Spectrum
 What produced
  • Spectrogram
 The resulting photo
  • Spectroscopy
The study of spectra
  • Spectroscopist
 The person studying spectra
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