Main Question or Discussion Point
This is probably pretty basic but I've never actually seen an explanation of how exactly the sine wave relates to the physical waves it is so commonly used to represent. Could it be imagined as like the periodic thumping of a speaker where the peak of the sine graph represents maximum air compression and trough maximum rarefaction? I used to imagine it being the actual shape of the wave but clearly that isn't the case because, as I understand it, waves don't actually look like squiggly lines propagating through space. Thanks in advance for any help!