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The wave diffracts and behaves like the opening is a point source.
The wave will pass through the transperent object
A mechanical wave travels through a medium because a medium is necessary for the propagation of that wave. With a mechanical wave, like sound, mechanical energy is put intothe wave, and the medium carries the energy of the wave. This is in contrast to an electromagnetic wave (like light) which can move through a total vacuum.
an S wave
A wave can only pass through a medium
the sesimic wave is the primary wave
what happens to interstellear gas as it passes through a spiral density wave
Is a big and strong wave that cleans, or destroy everything when it pass through.
The S-wave.
It will be like it was before
A smaller opening because it is harder for a wave to travel through smaller openings so after passing through it will diffract more.
It gets absorbed by the people, or at least by their clothing, and none of it remains on the other side of the people to proceed to the detector.