OPTICAL

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Across
  1. 3. Color match changes under different light sources
  2. 4. Separation of white light into its component colors by a prism
  3. 8. light Electromagnetic radiation with wavelengths from 400 to 700 nm
  4. 9. reflection Reflection in all directions from a rough surface
  5. 10. material Allows some light to pass; objects blurred (e.g., tooth enamel)
  6. 12. Device that digitally measures hue, chroma, and value
  7. 16. energy distribution curve Graph of light energy emitted at each wavelength
  8. 18. hues (subtractive) Cyan, magenta, yellow
  9. 21. Delayed light emission after excitation
  10. 24. Additives that create scattering centers to increase opacity
  11. 25. Instrument that measures reflected wavelengths for precise color
  12. 27. cells Retinal cells sensitive to red, green, and blue light
  13. 29. reflection Reflection in one direction from a perfectly smooth surface; angle of incidence equals angle of reflection
  14. 31. color mixing Mixing colored lights; red + green + blue equals white
  15. 32. colors Two light colors that mix to produce white
  16. 33. Redirection and weakening of light by particles or inclusions
  17. 34. Bending of light when passing from one medium to another due to speed change
Down
  1. 1. color mixing Mixing pigments; cyan + magenta + yellow equals black
  2. 2. Dominant wavelength; the name of the color (red, blue, etc.)
  3. 5. colors (additive) Cyan, magenta, yellow
  4. 6. Lightness/darkness scale from white (10) to black (0); most important for tooth vitality
  5. 7. Immediate light emission upon excitation (e.g., UV)
  6. 11. material Allows most light to pass; objects seen clearly (e.g., glass)
  7. 13. Emission of light without heating
  8. 14. colors (additive) Red, green, blue; cannot be made by mixing other lights
  9. 15. agents Rare-earth compounds added to restorations to mimic natural tooth fluorescence
  10. 16. guide Standardized tooth-colored tabs for visual color matching
  11. 17. blindness Inability to distinguish certain colors due to missing cone cells
  12. 19. Series of colored bands produced by dispersion
  13. 20. index Ratio of speed of light in vacuum to speed in the medium; used for identification
  14. 22. material Absorbs all light; no transmission (e.g., metal)
  15. 23. fatigue Reduced response to a color after prolonged viewing; complementary afterimage
  16. 26. spectrum Entire range of electromagnetic radiation from gamma rays to radio waves
  17. 28. Property controlling lightness; high translucency equals higher value (brighter)
  18. 30. Strength, saturation, or intensity of a color