Across
- 1. the bouncing back of a wave off a surface
- 4. the number of times the pattern of a wave repeats in a given time
- 8. the maximum distance the wave moves from its rest position
- 9. a tool used to turn white light to colored light and back
- 12. a material through which light does not pass
- 14. the passage of a wave through a medium
- 17. causes the particles in a medium to move parallel to the direction the wave is moving
- 19. the transfer of energy by a wave to the medium through which it travels
- 20. a wave that travels only through matter
Down
- 2. the highest point of a wave
- 3. a lens that is thicker on the sides than the middle
- 5. a lens that is thicker in the middle than the sides
- 6. the lowest point of a wave
- 7. a material that allows almost all light striking it to pass through, and through which objects can be seen clearly
- 10. a wave in which the disturbance is perpendicular to the direction it travels
- 11. a medium that only lets certain colors go through
- 13. a transparent object with at least one curved side that causes light to change direction
- 15. the distance between one point of a wave and the same point on the next wave
- 16. a material in which a wave travels
- 18. a pocket of space that contains little or no matter