The Eye

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Across
  1. 4. rays of light come together
  2. 6. describes the shape of a lens which causes rays of light to come together
  3. 7. describes the shape of a lense which causes rays of light to spreadt out
  4. 8. light changes direction when it passes from one medium into another
Down
  1. 1. an imaginary line at right-angles to the boundary between one medium and another
  2. 2. found in the eye and in glasses, this object causes light rays to change direction
  3. 3. found at the back of the eye, it is made up of light sensitive cells
  4. 5. rays of light spread out
  5. 6. found in front of the lens in the eye, it helps bring rays of light together