Your book should have indicated that's this is indeed not an accurate representation of the sound waves (and changes in amplitude like you just indicated) But you're right! In truth, the top picture should be really shown.
This sinusoidal waves are just drawn for learning purpose--to visually see how many wavelengths fit in the tube.
its graphed as a sinusodal wave as the longitudinal wave creates regions of compression and rarefaction. Regions of compression are crests and regions of rarefaction are troughs.
question: why do closed ends of pipes have to contain a node? why do open ends have to contain antinodes?
book says: there is always a displacement node at the closed end (because the air is not free to move) and an antinode at the open end (where the air can freely move.)
if air cannot move shouldn't it be a rarefaction?
NO WAIT a rarefaction indicates air movement. The only one that doesn't indicate air movement is node.
question: why do closed ends of pipes have to contain a node? why do open ends have to contain antinodes?
book says: there is always a displacement node at the closed end (because the air is not free to move) and an antinode at the open end (where the air can freely move.)
if air cannot move shouldn't it be a rarefaction?
NO WAIT a rarefaction indicates air movement. The only one that doesn't indicate air movement is node.
question: why do closed ends of pipes have to contain a node? why do open ends have to contain antinodes?
book says: there is always a displacement node at the closed end (because the air is not free to move) and an antinode at the open end (where the air can freely move.)
if air cannot move shouldn't it be a rarefaction?
NO WAIT a rarefaction indicates air movement. The only one that doesn't indicate air movement is node.
This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies and terms of service.