Mirrors and Lenses Crossword

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Across
  1. 2. The _______ refract light entering eye, and sends it to the back of the eye.
  2. 5. able to be seen.
  3. 8. sensitive membrane at the back of the inside of an eye.
  4. 9. An inward-curved lens.
  5. 12. Our eyes go through this process to give us sight.
  6. 13. If we look at a table and cannot see through it, then the table is__________.
  7. 14. this object uses different lenses to magnify and enhance the apperance of an object we are observing.
  8. 15. transmission of some light,but can cause it to distort.
  9. 18. an outward-curved lens.
  10. 19. we use this to see our reflection.
  11. 21. ______ makes things visible.
Down
  1. 1. light from us bounces off of a mirror to show us how we look in what is called.
  2. 3. nerves/transfers impulses to the brain for sight
  3. 4. Most windows are __________, because we can see through them amd they absorb little light.
  4. 6. the ________________ focuses light waves on the retina.
  5. 7. this device uses highly concentrated light.
  6. 10. an optical tool that uses refraction to separate different wavelengths that make up white light
  7. 11. where a wave moves apart.
  8. 16. This either refracts reflects or absorb light to change the way we view objects.
  9. 17. A ______ regulates the amount. of light entering they eye.
  10. 20. the act of seeing.