For Your Spare Time

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Across
  1. 2. Defined as the "reproduction of an object through the use of light"
  2. 4. Type of image formed when light does not arrive or come from the image location
  3. 6. Travels at 3.00x10^8 m/s (3 Words)
  4. 7. Type of image formed when light arrives or is reproduced by the image
  5. 8. Classificated depending on the colours of the rainbow (ROYGBIV) (2 Words)
  6. 10. Known as a condition of far sightedness
  7. 11. Defined as the perpendicular point stricken by the second medium and incident ray
  8. 12. Defined as the "bending of light when it passes from one medium to another"
Down
  1. 1. An example of the emission of light through a firefly
  2. 3. Represented by "A" in the acronym "SALT"
  3. 5. A ray which reflects outward from the reflection point
  4. 9. A ray of light that strikes a surface