Physics Year 8

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Across
  1. 3. a mirror with a flat reflective surface
  2. 5. a thing that doesn't let light pass through
  3. 6. I
  4. 8. it occurs in a optical fiber
  5. 10. R
  6. 12. instrument to see in the human body
Down
  1. 1. a ray that is reflected from a surface
  2. 2. Thin thread made of glass
  3. 4. a measurement of how much the light slows down entering in a dense mirror
  4. 7. Imaginary line perpendicular to the mirror
  5. 9. Changes in medium density cause this
  6. 11. unit of measure of light intensity