Sound, Waves, and Light

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.

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.