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Peters Ch. 25 vocab

QuestionAnswer
1. vibration a repeating back and forth motion about na equilibrium position
2. wave a disturbance that is transmitted progressivly from one place to the next with no actual transport of matter
3. period the time of the back and forth swing of the pendulum
4. simple harmonic motion the back and forth vibratory motion of a swinging pendulum
5. sine curve pictorial representation of a wave
6. crest the high points on a wave
7. trough the low points on the wave
8. amplitude the distance from the mmidpoint to the crest of the wave. is the maximum displacement from equilibrium
9. wavelength the distance from the top of one crest to the top of the next one
10. frequency the number of vibrations an object makes ina unit of time .
11. hertz the unit of frequency
12. transverse wave a wave with vibration at right angles to the direction the wave is traveling
13. longitudial wave a wave in which the vibration is in the same direction as that in which the wave is traveling, rather than at right angles to it
14. interference wave a pattern formed by the overlapping of two or more wavesthat arrive in a region at the same time
15. constructive interference addition of two or more waveswhen wave crests overlapto produce a resulting waveof increased amplitued
16. destructive interference combination of waves where crests of one wave overlap troughs of another, resulting in a wave of decreased amplitued
17. out of phase term applied to two waves for which the crest of one wave arrives at a point at the same time that a trough of the second wave arrives. there effects cancel each other
18. in phase term applied to two or morewaves whose crests (and troughs) arrive at a place at the same time, so that their effects reinenfore each other.
19. standing wave wave in which parts of the wave remainstationary and the wave appears not to be traveling. the result of interference between an incident ( an original ) wave and reflected wave.
20. Node a part of a wave that remains stationary
21. antinodes the positions on a standing wave where the largest amplitudes arrive
22. doppler effect the apperant change in freuquency of a wave dua to the motion of the source or of the reciever
23. blue shift increase in frequency
24. red shift decrease in frequency
25. bow wave when crests overlap at the edges, the pattern made by these overlapping crest in a V shape
26. shock wave a three-dimensional wavethat consistsof overlapping spheres that form a cone
27. sonic boom the sharp cracked heardwhen the shock wave that sweepsbehind a supersonic aircraft reaches the listeners, this is what we hear.
Created by: peters