Optics Crossword

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Across
  1. 3. a total shadow, darkest possible shadow
  2. 6. Light moves fastest in one of these
  3. 12. a partial shadow
  4. 13. The length of a wave; depends on its frequency
  5. 15. "two eyes"
  6. 17. The type of image formed by your eye's lens
  7. 20. Symbol = n
  8. 23. Objects that do not let any light through them
  9. 24. Electromagnetic Spectrum, abbreviated
  10. 25. Lets light through, but is not see-through
  11. 27. Reflection off of rough or uneven surfaces
  12. 28. Area of the eye that forms an image
  13. 30. Longer wavelength EM radiation detectable by cameras
  14. 32. Dutch scientist who examined light as a wave
  15. 35. Type of medium that refracts light rays toward the normal
  16. 36. The only type of image possible in concave mirrors
Down
  1. 1. Greek letter used as an abbreviation for 'angle'
  2. 2. opposite of crest
  3. 4. Angle of incidence always equals this
  4. 5. The height of a wave; depends on its energy
  5. 7. Lens type that mainly forms real images, rarely virtual
  6. 8. Form of short wavelength EM radiation not visible to us
  7. 9. Point of contact between principal axis & mirror surface
  8. 10. A name for all of the colours found in white light
  9. 11. Point located exactly one Focal Length away
  10. 14. English author of "Opticks" and "Principia"
  11. 16. Growing apart
  12. 17. Bending of light rays
  13. 18. A unit of light energy
  14. 19. Coming together
  15. 21. A word meaning "mirror-like", describes reflection
  16. 22. How many waves form in a second
  17. 26. An incoming ray of light
  18. 28. Always use one of these to draw ray diagrams
  19. 29. Condition of being nearsighted
  20. 31. Particle of light, proven to exist by Einstein
  21. 33. Improved the telescope
  22. 34. Every Science teacher's favourite food condiment