How Lasers Work

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Across
  1. 3. A tiny particle or "packet " of light
  2. 6. A device that produces a narrow powerful beam of light
  3. 8. The power used to make a laser work
  4. 9. To use a laser to read information (like a bar code)
Down
  1. 1. When light waves are in sync and moving togather
  2. 2. The tiny building block that make up everything
  3. 3. Very accurate or exact
  4. 4. Concentratred in one small area
  5. 5. A straight line of light
  6. 7. When light bounces off a surface , like mirrior