waves Flashcards
what are the two ways waves can be propagated
mechanically or electromagnetically
what is a travelling wave
a wave that carries anergy without disrupting the medium
what is a longitudinal wave
a wave thats direction is parallel to direction of energy
what is a travsverse wave
a wave that is vibrates perpendicularly to direction of wave motion
what are five wave phenomenona
diffraction, reflection, refraction, polarisation, interference
what is pitch of a notes
its frequency
what is a notes loudness
its amplitude
what us the quality of a notes
its number of overtones and relative strength
what makes something a quality overtone
if it is an integer multiple of the fundamental frequencya
what is resonance
the transfer of energy between two bodies with the same natural frequency
how does length of a string affect frequency
decreases frquency, inversely proportional
what part of a stationary wave is at the open end of a pipe
an antinode
what is formula for speed of sound in a closed pipe
4f (l+0.3d)
why is there a correction factor for open pipes
antinode ends outside of pipe
what is stress polarisation
when a product like a plastic model is placed between two polaroid screens at 90 degrees to each other
stress points are indentified by how they deviate the light with colour
