Lights and Lasers Crossword

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Across
  1. 1. to increase the apparent size of, the act of magnifying
  2. 3. the number of cycles or completed alternations per unit time of a wave or oscillation
  3. 5. the change of direction of light, sound, or heat
  4. 9. a device that produces a nearly parallel and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase
  5. 11. the range of wavelengths or frequencies over which electromagnetic radiation extends
  6. 13. a quantum of electromagnetic radiation, the smallest unit of light
  7. 14. a lens having at least one surface that curves outward
  8. 15. casting back a light or heat, mirroring, giving back or showing an image
Down
  1. 2. electromagnetic radiation with longer wavelengths of those than visible light
  2. 4. a line that intersects a system of lines
  3. 6. the angles that occupy the same relative position at each intersection where a straight line crosses two others
  4. 7. a lens having at least one surface that curves inward
  5. 8. electromagnetic radiation with wavelengths shorter than those of visible light
  6. 10. two exterior angles on opposite sides of a transversal which lie on different parallel lines
  7. 12. the distance between two successive points in a wave