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Across
  1. 2. The action of sending back light from a surface
  2. 3. The point of convergence of light
  3. 4. A light of light, electric waves
  4. 5. An atmospheric solar spectrum in the sky fro all to see
Down
  1. 1. A piece of transparent material that refracts light rays in such as way as to form an image
  2. 2. The form that some types of energy such as heat, sound, light take as they move
  3. 5. A narrow beam of light
  4. 6. To make a ray of light change direction when it goes through a transparent object