Visible light 2

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Across
  1. 4. Some light is able to travel through this material.
  2. 6. Hole in the centre of the iris that controls the amount of light that enters the eye.
  3. 8. Light travels to the material and is unable to travel any further.
  4. 9. Angle between the normal and the reflected ray.
  5. 13. Does not allow light to travel through.
Down
  1. 1. Imaginary flat surface that only has length and width, but no depth.
  2. 2. Light is able to travel through.
  3. 3. Sensory layer at the back of the eye.
  4. 5. Angle between the normal and the incident ray.
  5. 7. Light ray that is reflected by the reflective surface.
  6. 10. Imaginary line on a reflective surface that is perpendicular to the surface.
  7. 11. Protective front covering of the eye.
  8. 12. Light ray that travels to the reflective surface.
  9. 13. nerve Part of the eye that transmit information from the retina to the brain.