Across
- 4. light source made by mankind
- 6. all colours of light put together produce this "colour"
- 7. light travels in ...
- 9. green light that hits a red shoe will be ...
- 10. the distance between the lens and a screen is the ... distance
- 11. is corrected with a convex lens
- 12. when a ray of light changes direction between two materials
- 15. the absence of light
- 16. this colour refracts the most
- 17. something you can see that isn't really there
- 19. object that reflects light back to its source
- 22. what the U stands for in UV
- 24. the unit of power of a lens
- 26. when no sunlight reaches our side of the earth
- 27. your eye-lens forms an image of an object on the ...
Down
- 1. this type of lens turns a parallel beam into a divergent beam
- 2. stars and lightning are examples of ... light sources
- 3. adapting your eye-lens to different viewing distances
- 5. the distance a light ray travels in one year
- 8. is corrected with a concave lens
- 13. when the moon moves between earth and sun
- 14. a widening beam of light
- 15. all the colours of the rainbow in a row
- 18. multiple rays of light together
- 20. red light that hits a white shirt will be ...
- 21. a beam of light that has a constant width
- 23. heat radiation
- 25. object that shows you the different colours in "white" light