PHY 121 Module 5 Crossword

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Across
  1. 3. Instrument for collecting visible-light or other electromagnetic radiation.
  2. 5. The separation of different wavelengths of white light through refraction of different amounts.
  3. 7. detail in an image; specifically, the smallest angular (or linear) features that can be distinguished.
  4. 13. ____________aberration: a distortion that causes an image to appear fuzzy when each wavelength coming into a transparent material focuses at a different spot.
  5. 14. _______________ radiation consisting of waves propagated through regularly varying electric and magnetic fields and traveling at the speed of light.
  6. 15. a discrete unit (or “packet”) of electromagnetic energy.
  7. 16. an idealized object that absorbs all electromagnetic energy that falls onto it.
Down
  1. 1. Type of telescope in which the principal light collector is a concave mirror.
  2. 2. Diameter of the primary lens or mirror of a telescope.
  3. 4. Type of telescope in which the principal light collector is a lens or system of lenses.
  4. 6. device sensitive to electromagnetic radiation that makes a record of astronomical observations.
  5. 8. The point where the rays of light converged by a mirror or lens meet.
  6. 9. an atom that has become electrically charged by the addition or loss of one or more electrons.
  7. 10. Good ________ means the atmosphere is steady.
  8. 11. _________focus: the point in a telescope where the objective lens or primary mirror focuses the light
  9. 12. The most energetic form of electromagnetic radiation.