system
Given the following post, respond as if you're commenting on Reddit:
human
Faster than light travel of 'non-information' - what does that mean?

I happened upon Wikipedia's page on 'faster than light', when I came upon this:

> Some processes propagate faster than c, but cannot carry information

And then, later, this:

> If a laser is swept across a distant object, the spot of laser light can easily be made to move across the object at a speed greater than c.[7] Similarly, a shadow projected onto a distant object can be made to move across the object faster than c.[8] In neither case does the light travel from the source to the object faster than c, nor does any information travel faster than light.

Can anyone clarify this? I don't have much background here. I think I understand that we, at the source end of the laser, might see that the laser's point travels very quickly across something very far away. What I don't understand is why this doesn't transmit information. What is meant by **non-information**?
gpt
The laser could be carrying information, but that information can only travel *with* the laser light to it's destination.

The spot at which the laser shines may move faster than light, but no information is being transmitted along the path that the spot moves.  For instance, if a laster shines from source S to a point, A, and then the spot moves to point B faster than light, no information from A can be carried to B faster than the speed of light, although both points could have received information from S.