waves vocab

4. the Standard International ( SI ) unit of time.
7. mechanical disturbance from a state of equilibrium that propagates through an elastic material medium.
10. wave a wave that is not capable of transmitting its energy through a vacuum.
13. abrupt change in the direction of propagation of a wave that strikes the boundary between different mediums.
15. attribute that wave oscillations have a polarization definite direction relative to the direction of propagation of the wave.
16. The sensation of a frequency
18. the change in direction of a wave passing from one medium to another caused by its change in speed
19. the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
20. position the condition of a system when neither its state of motion nor its internal energy state tends to change with time.

1. the attribute of a sound that determines the magnitude of the auditory sensation produced and that primarily depends on the amplitude of the sound wave involved.
2. the spreading of waves around obstacles
3. the number of waves that pass a fixed point in unit time.
5. the reduction of an item's density, the opposite of compression.
6. relatively large selective response of an object or a system that vibrates in step or phase, with an externally applied oscillatory force.
8. the apparent difference between the frequency at which sound or light waves leave a source and that at which they reach an observer, caused by relative motion of the observer and the wave source.
9. x=Asin(w[t-K])+B
11. the point on the medium that exhibits the maximum amount of positive or upward displacement from the rest position.
12. wave a wave vibrating in the direction of propagation.
14. It is defined by taking the fixed numerical value of the speed of light
16. Period refers to the time it takes something to happen. Frequency is a rate quantity. Period is a time quantity.
17. a long, narrow open container for animals to eat or drink out of