It seems to me to be the same as a multipath TV signal causing
ghosting. The signal that is not on the direct path hits a building
and is reradiated and arrives at the TV at a different time.

....and how about the reflectors and directors on a Yagi antenna?

....where does the signal go when it hits something? It is either absorbed
or re-radiated -- some of course is lost in heating, but there is always
a little left over.

Food for thought!

Irv VE6BP

--
Political correctness is a doctrine, fostered by a delusional, illogical
minority, and rapidly promoted by an unscrupulous mainstream media, which
holds forth the proposition that it is entirely possible to pick up a piece
of **** by the clean end.