User blog comment:FairyTailFan7/Sting's Attacks Are Light Speed?/@comment-26715029-20150820131706/@comment-7418318-20150820144332

Come to think of it: How would Natsu even know what a laser is in the first place?

As far as I know real world Humans only came up with the term laser after we had sufficient technology to understand that what light is from a physical standpoint (the whole thing with particles, waves and such).

In the purely non-magical technology the FT world is a at steam-power level, so quite far away from analysing partices and waves... or even theoryzing about it.

For them laser could mean something completely different... or more probably something quite similar to our use, but still a little different. This possible certainty would surely incluse subliminal speeds.