Ziay!

sonic412781

Or could a vacuum be defined as being devoid of physical matter but still can contain energy?

matt the librarian

Light has a wave-particle duality. Sometimes it acts like a wave similar to a radio wave that can easily travel through a vacuum, and sometimes it acts like a particle.

The current wikipedia article explains it fairly well.

(Note- wikipedia is editable so if it seems wrong check the history and read the entry that was there at the time this was posted.)

ethanhant h

There is no definite theoritical/logical answer to your question..The more suitable answer can be explained by assuming the presence of a medium called ether

Jonny Q

Light has nothing to do with space. It is a property of the electromagnetic field when this field is undergoing changes. from its point of origin, this field radiates out into space in all directions. It is invisible, but can be felt by charged particles. When this field is changed, for instance by suddenly altering the position of its emitter, a kink develops in the field which propagates out into space at the speed of light. Under the right circumstances of acceleration, this kink becomes electromagnetic radiation - light. So space simply acts as a passive container for the electromagnetic field, which in turn is the 'medium' in which light exists.