Waves [P] Flashcards
Define the terms “Compression” and “Rarefaction”.
Compression - Where particles are stacked together
Rarefaction - Where particles are furthest apart.
What is the difference between Longitudinal and Transverse waves, regarding particle movement.
Longitudinal waves have particles oscillating parallel to the direction of the wave, as for Transverse waves the particles oscillate perpendicular to the wave direction.
Define the term “Propagation”.
The direction the wave is travelling.
What is and what isn’t transferred in waves?
Energy is transferred but matter isn’t.
Define “Wavelength” and the unit of measurement for it.
Wavelength - Distance from one peak of the wave to the other. Measured in meters (m).
Define the term “Trough”
The lowest point of a wave (minimum displacement).
Define the term “Crest”.
The peak (highest) point of a wave (maximum positive displacement).
Define the term “Amplitude”
The distance from the middle to the crest or trough.
A “complete wave” requires which 2 parts?
It requires a crest and a trough.
What is the symbol and unit of measurement for “Wavelength”?
The symbol is λ (upside down y) and the unit of measurement is metres (m).
What is the symbol and unit of measurement for “Frequency”?
The symbol is f (as in frequency) and the unit of measurement is Hertz (Hz).
What is the symbol and unit of measurement for “Wavespeed”?
The symbol is v (as in velocity) and the unit of measurement is metres/second (m/s).
Define the term “Stationary Waves”.
Waves that store energy rather than transfer it to another location.
Define the term “Node” and “Antinode”.
Node: A point that always has zero amplitude. Caused by a destructive interference
Antinode: A point of maximum amplitude between 2 nodes. Caused by a constructive interference.
What does coherent mean?
Waves that have the same wavelength and frequency and constant phase difference.
