Across
- 1. filter, a sheet of transparent material that modifies a light beam by selective absorption of some colors in relation to others.
- 4. the transfer of energy by a wave to the medium through which it travels.
- 7. the substance that transfers the energy, or light from one substance to another substance or from one place to another, or from one surface to another.
- 9. the bouncing of a wave off a surface.
- 11. a material that allows almost all of the light striking it to pass through, and through which objects can be seen clearly.
- 13. lens, a lens that is thicker in the middle than at the edges.
- 15. a material that allows most of the light that strikes it to pass through, but through which objects appear blurry.
- 17. mirrors, the flat surface that produces an erect visual image of a real object where front and back are reversed.
- 18. the distance between one point on a wave to the same point on the next wave.
- 19. the change in direction of a wave as it changes speed while moving from one medium to another.
Down
- 2. transparent objects with at least one curved side that causes light to change direction.
- 3. the number of times the pattern repeats a given time.
- 5. the maximum distance that the wave moves from its rest position.
- 6. the highest surface part of a wave.
- 7. Waves, is a wave that travels only through matter.
- 8. is the passage of a wave through a medium.
- 10. The change in direction of a wave when it travels by the edge of an object or through an opening.
- 12. waves, is a wave in which the disturbance is perpendicular to the direction the wave travels.
- 14. a material through which light does not pass.
- 16. waves, when the particles are in a medium and parallel to the direction that the wave travels.