No Stupid Questions
No such thing. Ask away!
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No, it's not. In physics, we call the entire spectrum "light", because it's all fundamentally the same thing.
We can talk about "visible light", but that's a subset of light in general. Microwaves, radio waves, x-rays, gamma radiation, and any other section of the spectrum you can think of are all light
https://en.wikipedia.org/wiki/Light
I didn't know that some physicists choose such confusing terminology. Electromagnetic radiation is the more clear term and i have learned it as such in school, e.g. light being a part of the electromagnetic spectrum and generally speaking of electromagnetic radiation rather than light.
Cause things get named CENTURIES before we understand them, and as we learn more, sometimes it makes sense to rename them, sometimes it is so engrained in daily life nobody would use the new names.