Across
- 1. an object used to focus light.
- 9. (n.) action of throwing back something from a surface without absorbing; a mirror image.
- 11. determining the height of a wave from a central line.
- 15. a vector perpendicular to the surface of an object.
- 16. (adj.)a state of which an object can partially pass light through.
- 17. a set of ideas used to explain something, it can be a guess.
- 18. (v.) action of throwing back something from a surface without absorbing.
- 19. the top half of a wave from the centre.
Down
- 1. electromagnetic energy visible to human eyes.
- 2. determining the distance between one wave peak to another.
- 3. the material light is passing through.
- 4. an object used to separate light into its different hues.
- 5. to visually represent something.
- 6. (adj.)a state of which an object cannot pass light through.
- 7. (n.)action of changing the direction of an object when entering a medium.
- 8. (adj.)a state of which an object can fully pass light through.
- 10. action of passing something from point to point.
- 11. action of taking something in, chemically or physically.
- 12. the bottom half of a wave from the centre.
- 13. determining the number of time something appears in a set of time or length.
- 14. sets of ripples that travel away from the source; they can take the form of vibration or light.