Unit 4

2. type of wave formed when two traveling waves of equal amplitude, frequency, and speed are superposed in opposite direction
6. the maximum displacement of a wave from rest position
7. lowest point on a wave
8. highest point of a wave
10. angle of incidence that produces an angle of refraction of 90 degrees
13. type of wave where crests and troughs do not change
15. the interference when the resultant has smaller amplitude
17. when the displacement is zero
18. _________ waves have oscillations parallel to the direction of energy
19. when two or more waves meet and combine

1. the shortest distance between two points that are in phase on a wave
3. surface that travels with a wave, perpendicular to direction it travels in
4. a line showing the direction in which a wave transfers energy, perpendicular to a wavefront
5. when waves pass through a narrow gap or slit, the waves spread out
9. particles are bunched up here
11. the interference when the resultant wave has larger amplitude than any of the individual waves
12. _____ harmonic reached when string vibrates with large amplitude in form of single loop
14. the number of oscillations per unit time
16. ________ waves have oscillations perpendicular to the direction of energy
20. particles are spread out here