Question:
Do waves continue indefinitely without loosing energy? (How?)
Replies:
It depends on what kind of waves you are talking about.
Electromagnetic waves do continue indefinitely without loosing energy as a whole
but as is obvious, this energy spreads over larger and larger regions
of space and so energy per unit area at the wavefront decreases.
NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.