Medium of light travel in space

[rekha1804]

What is the difference between space and vacuum?
Since light waves require a medium to travel, then what is the medium in space?

 

[Ibix]

Since light waves require a medium to travel,

They don't. Discovering that there's no evidence of a medium was a large part of the work that led to relativity theory.

 

[PeroK]

What is the difference between space and vacuum?

Empty space is a vacuum. Interstellar and intergalactic space are almost empty, but not quite.

 

[Orodruin]

Since light waves require a medium to travel

This is a faulty assumption and you would do well to get rid of it.