Light

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Across
  1. 4. Angle equal to the incidence.
  2. 5. The separation of colours in ‘The Clear Triangle’.
  3. 6. The source of the classroom rainbow.
  4. 7. It shines from the sun.
  5. 8. Who is the fairest of them all.
  6. 10. Bend travelling in different materials.
  7. 12. Like looking through fog.
  8. 13. It comes from a source like the Sun.
  9. 14. You can’t see through it.
  10. 16. It is always the same.
  11. 18. Bend light from rain.
Down
  1. 1. From peak to peak.
  2. 2. The whole range including visible.
  3. 3. Can see right through it.
  4. 9. You can cook with them.
  5. 11. How many in a second.
  6. 15. The clear triangle.
  7. 17. What the Predator sees.