Einstein verified that light takes a curved path through space-time but it should be included that the wave itself is curved. The electromagnetic wave occupies curvature. This would seem to vary it from a sin wave. It would be a "curved" electromagnetic ray.
Also, are stars round? By virtue of there own gravity they occupy a curved space. The extension of matter in curved space is what I wish to address here. Anybody know anymore about it? What happens to a measuring rod set close to a black hole? Building a wall on a neutron star seems doomed. When we look out at this entire curved universe it seems spherical. It is a sphere but it is hyper. It is a 4Sphere or 4 dimensional sphere curved back on itself in the 4th dimension.
The closed cosmology of the hypersphere was first introduced by Einstein. Cosmology now says that matter occupies the surface of this expanding 4Sphere where the space and light stretch out in between the galaxies. This space stretch is not actually the same as galaxies moving through preexisting space away from one another. The space stretch is simply more space being created in between them.

