Lasers and other stuff like that

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Across
  1. 5. reflecting light
  2. 7. light amplification by stimulated emission of radiation
  3. 8. an elementary particle
  4. 9. invisible radiant energy
  5. 10. how many times something is repeated
  6. 12. When two lines are crossed by another line
  7. 13. When two lines are crossed by another line
  8. 14. the length between the top of waves
  9. 15. electromagnetic radiation
Down
  1. 1. lenses that are thicker at the middle
  2. 2. a spectrum of electromagnetics
  3. 3. making something bigger using a lens
  4. 4. A line that cuts across two or more (usually parallel) lines.
  5. 6. lenses that are skinny at the middle
  6. 11. Spitting light