Hello everyone! In a hypothetical 3D space, with no boundaries around, homogeneous normal conditions, what would happen to the advancement of a planar wave front produced at t=0 with 2cycles in length, λ=3.5m, moving with vector speed "c-arrow=1i-arrow" if an identical planar wave of 2cycles in lenght which origin is x(7,0) moving with vector speed "c-arrow=-1i-arrow" is produced also at t=0. Would the planar waves just cancel each other between the origins and disperse? or they would cancel each other between the origins but they would keep advancing in their respective directions? Maybe it's a dumb question but I can't figure it out.