physical science

6. an observed change in the frequency of a wave when the source or observer is moving
7. the distance from any point on a wave to an identical point on the next wave
9. in physics, the time that it takes to complete a cycle or wave oscillation to occur
11. waves that cause the particles in a medium to vibrate parallel to the direction of the wave's motion
13. The matter through which a wave travels
14. the combination of two or more waves that result in a single wave
15. a pattern of vibration that stimulates a wave that is standing still
16. a superposition of two or more waves that produces an intensity equal to the difference of the intensities of the individual waves
17. the number of cycles or vibrations per unit of time
18. the bending of a wave front as the wave front passes between two substances in which the speed of the wave differs

1. the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go through
2. a wave that consists of oscillating electric and magnetic fields which radiate outward at the speed of light
3. waves that require a medium
4. the maximum distance that the particles of a wave's medium vibrate from their rest position
5. a superposition of two or more waves that produces an intensity equal to the sum of the intensities of the individual waves
8. low points of transverse waves
10. waves in which the motion of the particles is perpendicular to the motion of the wave
12. a change in the direction of a wave when the wave finds an obstacle or an edge
19. high points of transverse waves