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Glossary of Physics Lap 6 Chapter 19 Review Questions

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What is the source of all waves?
Vibrations.
What is meant by the period of a pendulum?
Time for one back and forth.
How do frequency and period relate to each other?
They are the reciprocal of each other.
In what direction are the vibrations relative to the direction of wave travel in a transverse wave?
Perpendicular to the direction of wave travel.
What is the wavelength of a transverse wave?
The distance between successive crests (or troughs).
What is the wavelength of a longitudinal wave?
The distance between successive compressions, or equivalenty, the distance between successive rarefactions.
Distinguish between constructive interference and destructive interference.
Constructive interference is when the two waves are out of phase. Destructive interference is when the two waves are in phase.
What causes a standing wave?
By a wave being reflected back on its self.
What is a node?
Part of a standing wave where there is no movement.
What is an antinode?
Part of a standing wave where there is greatest movement.
In the doppler effect, does frequency change? Does wavelength change? Does wave speed change?
Yes. Yes. No.
What is meant by a blue shift and a red shift for light?
Blueshift is where the light source is moving away. Red shift is where the light moves toward you.
How fast does a supersonic aircraft fly compared with the speed of sound?
Faster than the speed of sound.

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