Across
- 1. where the image is formed
- 5. all the light has the same wavelength and all the rays move in the same direction
- 6. prevents all light from passing through
- 9. the bending or changing of a wave as it passes a material
- 10. a curved piece of transparent material
- 11. sound waves that move matter back and forth
- 14. carried by waves
- 15. the highest point in a wave
- 16. used in remote sensing
- 17. blocks light from the sun and casts a
Down
- 2. the height of a wave crest
- 3. coloured circle of muscle in your eye
- 4. what occurs when a light wave bounces off an object
- 7. most rays get through but are scattered in different directions
- 8. the lowest point in wave
- 11. covers the iris and the pupil
- 12. shortest wavelength and highest frequency
- 13. the range of colours or frequencies of visible light
- 18. what frequency is measured in
- 19. a movement that transfers energy