Sometimes she feels like waving, and sometimes she doesn't. We have considerably less idea of what is going on in her head than you do.
Question is: Is he interested in you?
Wave Back!
she doesnt support it
inferd is its own wave it doesnt emit a wave
That probably means she is trying to make your girlfriend jealous...Maybe. It depends on what kind of person she is.
different mediums
It doesnt.
Transverse wave longitudinal wave-hint back and forth
non matter,it doue not have mass and doesnt occcupt a space
electromagnetic. for example, light.
The fastest seismic wave that also moves back and forth is the P-wave.
It can be absorbed or transmitted through an object it can bend sometimes it bounces back 😉