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